Add latest changes from gitlab-org/gitlab@master

22 files changed, 1290 insertions, 0 deletions

diff --git a/spec/contracts/.gitignore b/spec/contracts/.gitignore
new file mode 100644
index 00000000000..cb89d4102d3
--- /dev/null
+++ b/spec/contracts/.gitignore
@@ -0,0 +1,2 @@
+logs/
+consumer/node_modules
diff --git a/spec/contracts/consumer/.node-version b/spec/contracts/consumer/.node-version
new file mode 100644
index 00000000000..18711d290ea
--- /dev/null
+++ b/spec/contracts/consumer/.node-version
@@ -0,0 +1 @@
+14.17.5
diff --git a/spec/contracts/consumer/endpoints/merge_requests.js b/spec/contracts/consumer/endpoints/merge_requests.js
new file mode 100644
index 00000000000..04e66c57dc9
--- /dev/null
+++ b/spec/contracts/consumer/endpoints/merge_requests.js
@@ -0,0 +1,42 @@
+'use strict';
+
+const axios = require('axios');
+
+exports.getMetadata = (endpoint) => {
+  const url = endpoint.url;
+
+  return axios
+    .request({
+      method: 'GET',
+      baseURL: url,
+      url: '/gitlab-org/gitlab-qa/-/merge_requests/1/diffs_metadata.json',
+      headers: { Accept: '*/*' },
+    })
+    .then((response) => response.data);
+};
+
+exports.getDiscussions = (endpoint) => {
+  const url = endpoint.url;
+
+  return axios
+    .request({
+      method: 'GET',
+      baseURL: url,
+      url: '/gitlab-org/gitlab-qa/-/merge_requests/1/discussions.json',
+      headers: { Accept: '*/*' },
+    })
+    .then((response) => response.data);
+};
+
+exports.getDiffs = (endpoint) => {
+  const url = endpoint.url;
+
+  return axios
+    .request({
+      method: 'GET',
+      baseURL: url,
+      url: '/gitlab-org/gitlab-qa/-/merge_requests/1/diffs_batch.json?page=0',
+      headers: { Accept: '*/*' },
+    })
+    .then((response) => response.data);
+};
diff --git a/spec/contracts/consumer/fixtures/diffs.fixture.js b/spec/contracts/consumer/fixtures/diffs.fixture.js
new file mode 100644
index 00000000000..7dbe825b093
--- /dev/null
+++ b/spec/contracts/consumer/fixtures/diffs.fixture.js
@@ -0,0 +1,89 @@
+'use strict';
+
+const { Matchers } = require('@pact-foundation/pact');
+
+const body = {
+  diff_files: Matchers.eachLike({
+    content_sha: Matchers.string('b0c94059db75b2473d616d4b1fde1a77533355a3'),
+    submodule: Matchers.boolean(false),
+    edit_path: Matchers.string('/gitlab-qa-bot/...'),
+    ide_edit_path: Matchers.string('/gitlab-qa-bot/...'),
+    old_path_html: Matchers.string('Gemfile'),
+    new_path_html: Matchers.string('Gemfile'),
+    blob: {
+      id: Matchers.string('855071bb3928d140764885964f7be1bb3e582495'),
+      path: Matchers.string('Gemfile'),
+      name: Matchers.string('Gemfile'),
+      mode: Matchers.string('1234567'),
+      readable_text: Matchers.boolean(true),
+      icon: Matchers.string('doc-text'),
+    },
+    can_modify_blob: Matchers.boolean(false),
+    file_identifier_hash: Matchers.string('67d82b8716a5b6c52c7abf0b2cd99c7594ed3587'),
+    file_hash: Matchers.string('67d82b8716a5b6c52c7abf0b2cd99c7594ed3587'),
+    file_path: Matchers.string('Gemfile'),
+    old_path: Matchers.string('Gemfile'),
+    new_path: Matchers.string('Gemfile'),
+    new_file: Matchers.boolean(false),
+    renamed_file: Matchers.boolean(false),
+    deleted_file: Matchers.boolean(false),
+    diff_refs: {
+      base_sha: Matchers.string('67d82b8716a5b6c52c7abf0b2cd99c7594ed3587'),
+      start_sha: Matchers.string('67d82b8716a5b6c52c7abf0b2cd99c7594ed3587'),
+      head_sha: Matchers.string('67d82b8716a5b6c52c7abf0b2cd99c7594ed3587'),
+    },
+    mode_changed: Matchers.boolean(false),
+    a_mode: Matchers.string('123456'),
+    b_mode: Matchers.string('123456'),
+    viewer: {
+      name: Matchers.string('text'),
+      collapsed: Matchers.boolean(false),
+    },
+    old_size: Matchers.integer(2288),
+    new_size: Matchers.integer(2288),
+    added_lines: Matchers.integer(1),
+    removed_lines: Matchers.integer(1),
+    load_collapsed_diff_url: Matchers.string('/gitlab-qa-bot/...'),
+    view_path: Matchers.string('/gitlab-qa-bot/...'),
+    context_lines_path: Matchers.string('/gitlab-qa-bot/...'),
+    highlighted_diff_lines: Matchers.eachLike({
+      // The following values can also be null which is not supported
+      //line_code: Matchers.string('de3150c01c3a946a6168173c4116741379fe3579_1_1'),
+      //old_line: Matchers.integer(1),
+      //new_line: Matchers.integer(1),
+      text: Matchers.string('source'),
+      rich_text: Matchers.string('<span></span>'),
+      can_receive_suggestion: Matchers.boolean(true),
+    }),
+    is_fully_expanded: Matchers.boolean(false),
+  }),
+  pagination: {
+    total_pages: Matchers.integer(1),
+  },
+};
+
+const Diffs = {
+  body: Matchers.extractPayload(body),
+
+  success: {
+    status: 200,
+    headers: {
+      'Content-Type': 'application/json; charset=utf-8',
+    },
+    body: body,
+  },
+
+  request: {
+    uponReceiving: 'a request for diff lines',
+    withRequest: {
+      method: 'GET',
+      path: '/gitlab-org/gitlab-qa/-/merge_requests/1/diffs_batch.json',
+      headers: {
+        Accept: '*/*',
+      },
+      query: 'page=0',
+    },
+  },
+};
+
+exports.Diffs = Diffs;
diff --git a/spec/contracts/consumer/fixtures/discussions.fixture.js b/spec/contracts/consumer/fixtures/discussions.fixture.js
new file mode 100644
index 00000000000..c28b9bdd505
--- /dev/null
+++ b/spec/contracts/consumer/fixtures/discussions.fixture.js
@@ -0,0 +1,85 @@
+'use strict';
+
+const { Matchers } = require('@pact-foundation/pact');
+
+const body = Matchers.eachLike({
+  id: Matchers.string('fd73763cbcbf7b29eb8765d969a38f7d735e222a'),
+  reply_id: Matchers.string('fd73763cbcbf7b29eb8765d969a38f7d735e222a'),
+  project_id: Matchers.integer(6954442),
+  confidential: Matchers.boolean(false),
+  diff_discussion: Matchers.boolean(false),
+  expanded: Matchers.boolean(false),
+  for_commit: Matchers.boolean(false),
+  individual_note: Matchers.boolean(true),
+  resolvable: Matchers.boolean(false),
+  resolved_by_push: Matchers.boolean(false),
+  notes: Matchers.eachLike({
+    id: Matchers.string('76489845'),
+    author: {
+      id: Matchers.integer(1675733),
+      username: Matchers.string('gitlab-qa-bot'),
+      name: Matchers.string('gitlab-qa-bot'),
+      state: Matchers.string('active'),
+      avatar_url: Matchers.string(
+        'https://secure.gravatar.com/avatar/8355ad0f2761367fae6b9c4fe80994b9?s=80&d=identicon',
+      ),
+      show_status: Matchers.boolean(false),
+      path: Matchers.string('/gitlab-qa-bot'),
+    },
+    created_at: Matchers.iso8601DateTimeWithMillis('2022-02-22T07:06:55.038Z'),
+    updated_at: Matchers.iso8601DateTimeWithMillis('2022-02-22T07:06:55.038Z'),
+    system: Matchers.boolean(false),
+    noteable_id: Matchers.integer(8333422),
+    noteable_type: Matchers.string('MergeRequest'),
+    resolvable: Matchers.boolean(false),
+    resolved: Matchers.boolean(true),
+    confidential: Matchers.boolean(false),
+    noteable_iid: Matchers.integer(1),
+    note: Matchers.string('This is a test comment'),
+    note_html: Matchers.string(
+      '<p data-sourcepos="1:1-1:22" dir="auto">This is a test comment</p>',
+    ),
+    current_user: {
+      can_edit: Matchers.boolean(true),
+      can_award_emoji: Matchers.boolean(true),
+      can_resolve: Matchers.boolean(false),
+      can_resolve_discussion: Matchers.boolean(false),
+    },
+    is_noteable_author: Matchers.boolean(true),
+    discussion_id: Matchers.string('fd73763cbcbf7b29eb8765d969a38f7d735e222a'),
+    emoji_awardable: Matchers.boolean(true),
+    report_abuse_path: Matchers.string('/gitlab-qa-bot/...'),
+    noteable_note_url: Matchers.string('https://staging.gitlab.com/gitlab-qa-bot/...'),
+    cached_markdown_version: Matchers.integer(1900552),
+    human_access: Matchers.string('Maintainer'),
+    is_contributor: Matchers.boolean(false),
+    project_name: Matchers.string('contract-testing'),
+    path: Matchers.string('/gitlab-qa-bot/...'),
+  }),
+  resolved: Matchers.boolean(true),
+});
+
+const Discussions = {
+  body: Matchers.extractPayload(body),
+
+  success: {
+    status: 200,
+    headers: {
+      'Content-Type': 'application/json; charset=utf-8',
+    },
+    body: body,
+  },
+
+  request: {
+    uponReceiving: 'a request for discussions',
+    withRequest: {
+      method: 'GET',
+      path: '/gitlab-org/gitlab-qa/-/merge_requests/1/discussions.json',
+      headers: {
+        Accept: '*/*',
+      },
+    },
+  },
+};
+
+exports.Discussions = Discussions;
diff --git a/spec/contracts/consumer/fixtures/metadata.fixture.js b/spec/contracts/consumer/fixtures/metadata.fixture.js
new file mode 100644
index 00000000000..3fca6cf9181
--- /dev/null
+++ b/spec/contracts/consumer/fixtures/metadata.fixture.js
@@ -0,0 +1,96 @@
+'use strict';
+
+const { Matchers } = require('@pact-foundation/pact');
+
+const body = {
+  real_size: Matchers.string('1'),
+  size: Matchers.integer(1),
+  branch_name: Matchers.string('testing-branch-1'),
+  source_branch_exists: Matchers.boolean(true),
+  target_branch_name: Matchers.string('master'),
+  merge_request_diff: {
+    created_at: Matchers.iso8601DateTimeWithMillis('2022-02-17T11:47:08.804Z'),
+    commits_count: Matchers.integer(1),
+    latest: Matchers.boolean(true),
+    short_commit_sha: Matchers.string('aee1ffec'),
+    base_version_path: Matchers.string(
+      '/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773',
+    ),
+    head_version_path: Matchers.string(
+      '/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_head=true',
+    ),
+    version_path: Matchers.string(
+      '/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773',
+    ),
+    compare_path: Matchers.string(
+      '/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773&start_sha=aee1ffec2299c0cfb17c8821e931339b73a3759f',
+    ),
+  },
+  latest_diff: Matchers.boolean(true),
+  latest_version_path: Matchers.string('/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs'),
+  added_lines: Matchers.integer(1),
+  removed_lines: Matchers.integer(1),
+  render_overflow_warning: Matchers.boolean(false),
+  email_patch_path: Matchers.string('/gitlab-qa-bot/contract-testing/-/merge_requests/1.patch'),
+  plain_diff_path: Matchers.string('/gitlab-qa-bot/contract-testing/-/merge_requests/1.diff'),
+  merge_request_diffs: Matchers.eachLike({
+    commits_count: Matchers.integer(1),
+    latest: Matchers.boolean(true),
+    short_commit_sha: Matchers.string('aee1ffec'),
+    base_version_path: Matchers.string(
+      '/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773',
+    ),
+    head_version_path: Matchers.string(
+      '/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_head=true',
+    ),
+    version_path: Matchers.string(
+      '/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773',
+    ),
+    compare_path: Matchers.string(
+      '/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773&start_sha=aee1ffec2299c0cfb17c8821e931339b73a3759f',
+    ),
+  }),
+  definition_path_prefix: Matchers.string(
+    '/gitlab-qa-bot/contract-testing/-/blob/aee1ffec2299c0cfb17c8821e931339b73a3759f',
+  ),
+  diff_files: Matchers.eachLike({
+    added_lines: Matchers.integer(1),
+    removed_lines: Matchers.integer(1),
+    new_path: Matchers.string('Gemfile'),
+    old_path: Matchers.string('Gemfile'),
+    new_file: Matchers.boolean(false),
+    deleted_file: Matchers.boolean(false),
+    submodule: Matchers.boolean(false),
+    file_identifier_hash: Matchers.string('67d82b8716a5b6c52c7abf0b2cd99c7594ed3587'),
+    file_hash: Matchers.string('de3150c01c3a946a6168173c4116741379fe3579'),
+  }),
+  has_conflicts: Matchers.boolean(false),
+  can_merge: Matchers.boolean(false),
+  project_path: Matchers.string('gitlab-qa-bot/contract-testing'),
+  project_name: Matchers.string('contract-testing'),
+};
+
+const Metadata = {
+  body: Matchers.extractPayload(body),
+
+  success: {
+    status: 200,
+    headers: {
+      'Content-Type': 'application/json; charset=utf-8',
+    },
+    body: body,
+  },
+
+  request: {
+    uponReceiving: 'a request for Metadata',
+    withRequest: {
+      method: 'GET',
+      path: '/gitlab-org/gitlab-qa/-/merge_requests/1/diffs_metadata.json',
+      headers: {
+        Accept: '*/*',
+      },
+    },
+  },
+};
+
+exports.Metadata = Metadata;
diff --git a/spec/contracts/consumer/package.json b/spec/contracts/consumer/package.json
new file mode 100644
index 00000000000..6a427ff8a7b
--- /dev/null
+++ b/spec/contracts/consumer/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "consumer",
+  "version": "1.0.0",
+  "description": "consumer side contract testing",
+  "license": "MIT",
+  "repository": "https://gitlab.com/gitlab-org/gitlab.git",
+  "dependencies": {
+    "@pact-foundation/pact": "^9.17.2",
+    "axios": "^0.26.0",
+    "jest": "^27.5.1",
+    "jest-pact": "^0.9.1",
+    "prettier": "^2.5.1"
+  },
+  "scripts": {
+    "test": "jest --runInBand"
+  }
+}
diff --git a/spec/contracts/consumer/specs/diffs.spec.js b/spec/contracts/consumer/specs/diffs.spec.js
new file mode 100644
index 00000000000..b812461cb69
--- /dev/null
+++ b/spec/contracts/consumer/specs/diffs.spec.js
@@ -0,0 +1,36 @@
+'use strict';
+
+const { pactWith } = require('jest-pact');
+
+const { Diffs } = require('../fixtures/diffs.fixture');
+const { getDiffs } = require('../endpoints/merge_requests');
+
+pactWith(
+  {
+    consumer: 'Merge Request Page',
+    provider: 'Merge Request Diffs Endpoint',
+    log: '../logs/consumer.log',
+    dir: '../contracts',
+  },
+
+  (provider) => {
+    describe('Diffs Endpoint', () => {
+      beforeEach(() => {
+        const interaction = {
+          state: 'a merge request with diffs exists',
+          ...Diffs.request,
+          willRespondWith: Diffs.success,
+        };
+        provider.addInteraction(interaction);
+      });
+
+      it('return a successful body', () => {
+        return getDiffs({
+          url: provider.mockService.baseUrl,
+        }).then((diffs) => {
+          expect(diffs).toEqual(Diffs.body);
+        });
+      });
+    });
+  },
+);
diff --git a/spec/contracts/consumer/specs/discussions.spec.js b/spec/contracts/consumer/specs/discussions.spec.js
new file mode 100644
index 00000000000..304c240f7d3
--- /dev/null
+++ b/spec/contracts/consumer/specs/discussions.spec.js
@@ -0,0 +1,36 @@
+'use strict';
+
+const { pactWith } = require('jest-pact');
+
+const { Discussions } = require('../fixtures/discussions.fixture');
+const { getDiscussions } = require('../endpoints/merge_requests');
+
+pactWith(
+  {
+    consumer: 'Merge Request Page',
+    provider: 'Merge Request Discussions Endpoint',
+    log: '../logs/consumer.log',
+    dir: '../contracts',
+  },
+
+  (provider) => {
+    describe('Discussions Endpoint', () => {
+      beforeEach(() => {
+        const interaction = {
+          state: 'a merge request with discussions exists',
+          ...Discussions.request,
+          willRespondWith: Discussions.success,
+        };
+        provider.addInteraction(interaction);
+      });
+
+      it('return a successful body', () => {
+        return getDiscussions({
+          url: provider.mockService.baseUrl,
+        }).then((discussions) => {
+          expect(discussions).toEqual(Discussions.body);
+        });
+      });
+    });
+  },
+);
diff --git a/spec/contracts/consumer/specs/metadata.spec.js b/spec/contracts/consumer/specs/metadata.spec.js
new file mode 100644
index 00000000000..c49d4c354b1
--- /dev/null
+++ b/spec/contracts/consumer/specs/metadata.spec.js
@@ -0,0 +1,36 @@
+'use strict';
+
+const { pactWith } = require('jest-pact');
+
+const { Metadata } = require('../fixtures/metadata.fixture');
+const { getMetadata } = require('../endpoints/merge_requests');
+
+pactWith(
+  {
+    consumer: 'Merge Request Page',
+    provider: 'Merge Request Metadata Endpoint',
+    log: '../logs/consumer.log',
+    dir: '../contracts',
+  },
+
+  (provider) => {
+    describe('Metadata Endpoint', () => {
+      beforeEach(() => {
+        const interaction = {
+          state: 'a merge request exists',
+          ...Metadata.request,
+          willRespondWith: Metadata.success,
+        };
+        provider.addInteraction(interaction);
+      });
+
+      it('return a successful body', () => {
+        return getMetadata({
+          url: provider.mockService.baseUrl,
+        }).then((metadata) => {
+          expect(metadata).toEqual(Metadata.body);
+        });
+      });
+    });
+  },
+);
diff --git a/spec/contracts/contracts/merge_request_page-merge_request_diffs_endpoint.json b/spec/contracts/contracts/merge_request_page-merge_request_diffs_endpoint.json
new file mode 100644
index 00000000000..2f097d8eb24
--- /dev/null
+++ b/spec/contracts/contracts/merge_request_page-merge_request_diffs_endpoint.json
@@ -0,0 +1,229 @@
+{
+  "consumer": {
+    "name": "Merge Request Page"
+  },
+  "provider": {
+    "name": "Merge Request Diffs Endpoint"
+  },
+  "interactions": [
+    {
+      "description": "a request for diff lines",
+      "providerState": "a merge request with diffs exists",
+      "request": {
+        "method": "GET",
+        "path": "/gitlab-org/gitlab-qa/-/merge_requests/1/diffs_batch.json",
+        "query": "page=0",
+        "headers": {
+          "Accept": "*/*"
+        }
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "Content-Type": "application/json; charset=utf-8"
+        },
+        "body": {
+          "diff_files": [
+            {
+              "content_sha": "b0c94059db75b2473d616d4b1fde1a77533355a3",
+              "submodule": false,
+              "edit_path": "/gitlab-qa-bot/...",
+              "ide_edit_path": "/gitlab-qa-bot/...",
+              "old_path_html": "Gemfile",
+              "new_path_html": "Gemfile",
+              "blob": {
+                "id": "855071bb3928d140764885964f7be1bb3e582495",
+                "path": "Gemfile",
+                "name": "Gemfile",
+                "mode": "1234567",
+                "readable_text": true,
+                "icon": "doc-text"
+              },
+              "can_modify_blob": false,
+              "file_identifier_hash": "67d82b8716a5b6c52c7abf0b2cd99c7594ed3587",
+              "file_hash": "67d82b8716a5b6c52c7abf0b2cd99c7594ed3587",
+              "file_path": "Gemfile",
+              "old_path": "Gemfile",
+              "new_path": "Gemfile",
+              "new_file": false,
+              "renamed_file": false,
+              "deleted_file": false,
+              "diff_refs": {
+                "base_sha": "67d82b8716a5b6c52c7abf0b2cd99c7594ed3587",
+                "start_sha": "67d82b8716a5b6c52c7abf0b2cd99c7594ed3587",
+                "head_sha": "67d82b8716a5b6c52c7abf0b2cd99c7594ed3587"
+              },
+              "mode_changed": false,
+              "a_mode": "123456",
+              "b_mode": "123456",
+              "viewer": {
+                "name": "text",
+                "collapsed": false
+              },
+              "old_size": 2288,
+              "new_size": 2288,
+              "added_lines": 1,
+              "removed_lines": 1,
+              "load_collapsed_diff_url": "/gitlab-qa-bot/...",
+              "view_path": "/gitlab-qa-bot/...",
+              "context_lines_path": "/gitlab-qa-bot/...",
+              "highlighted_diff_lines": [
+                {
+                  "text": "source",
+                  "rich_text": "<span></span>",
+                  "can_receive_suggestion": true
+                }
+              ],
+              "is_fully_expanded": false
+            }
+          ],
+          "pagination": {
+            "total_pages": 1
+          }
+        },
+        "matchingRules": {
+          "$.body.diff_files": {
+            "min": 1
+          },
+          "$.body.diff_files[*].*": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].content_sha": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].submodule": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].edit_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].ide_edit_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].old_path_html": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].new_path_html": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].blob.id": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].blob.path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].blob.name": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].blob.mode": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].blob.readable_text": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].blob.icon": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].can_modify_blob": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].file_identifier_hash": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].file_hash": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].file_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].old_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].new_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].new_file": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].renamed_file": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].deleted_file": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].diff_refs.base_sha": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].diff_refs.start_sha": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].diff_refs.head_sha": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].mode_changed": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].a_mode": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].b_mode": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].viewer.name": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].viewer.collapsed": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].old_size": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].new_size": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].added_lines": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].removed_lines": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].load_collapsed_diff_url": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].view_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].context_lines_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].highlighted_diff_lines": {
+            "min": 1
+          },
+          "$.body.diff_files[*].highlighted_diff_lines[*].*": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].highlighted_diff_lines[*].text": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].highlighted_diff_lines[*].rich_text": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].highlighted_diff_lines[*].can_receive_suggestion": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].is_fully_expanded": {
+            "match": "type"
+          },
+          "$.body.pagination.total_pages": {
+            "match": "type"
+          }
+        }
+      }
+    }
+  ],
+  "metadata": {
+    "pactSpecification": {
+      "version": "2.0.0"
+    }
+  }
+}
diff --git a/spec/contracts/contracts/merge_request_page-merge_request_discussions_endpoint.json b/spec/contracts/contracts/merge_request_page-merge_request_discussions_endpoint.json
new file mode 100644
index 00000000000..819d95276b3
--- /dev/null
+++ b/spec/contracts/contracts/merge_request_page-merge_request_discussions_endpoint.json
@@ -0,0 +1,236 @@
+{
+  "consumer": {
+    "name": "Merge Request Page"
+  },
+  "provider": {
+    "name": "Merge Request Discussions Endpoint"
+  },
+  "interactions": [
+    {
+      "description": "a request for discussions",
+      "providerState": "a merge request with discussions exists",
+      "request": {
+        "method": "GET",
+        "path": "/gitlab-org/gitlab-qa/-/merge_requests/1/discussions.json",
+        "headers": {
+          "Accept": "*/*"
+        }
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "Content-Type": "application/json; charset=utf-8"
+        },
+        "body": [
+          {
+            "id": "fd73763cbcbf7b29eb8765d969a38f7d735e222a",
+            "reply_id": "fd73763cbcbf7b29eb8765d969a38f7d735e222a",
+            "project_id": 6954442,
+            "confidential": false,
+            "diff_discussion": false,
+            "expanded": false,
+            "for_commit": false,
+            "individual_note": true,
+            "resolvable": false,
+            "resolved_by_push": false,
+            "notes": [
+              {
+                "id": "76489845",
+                "author": {
+                  "id": 1675733,
+                  "username": "gitlab-qa-bot",
+                  "name": "gitlab-qa-bot",
+                  "state": "active",
+                  "avatar_url": "https://secure.gravatar.com/avatar/8355ad0f2761367fae6b9c4fe80994b9?s=80&d=identicon",
+                  "show_status": false,
+                  "path": "/gitlab-qa-bot"
+                },
+                "created_at": "2022-02-22T07:06:55.038Z",
+                "updated_at": "2022-02-22T07:06:55.038Z",
+                "system": false,
+                "noteable_id": 8333422,
+                "noteable_type": "MergeRequest",
+                "resolvable": false,
+                "resolved": true,
+                "confidential": false,
+                "noteable_iid": 1,
+                "note": "This is a test comment",
+                "note_html": "<p data-sourcepos=\"1:1-1:22\" dir=\"auto\">This is a test comment</p>",
+                "current_user": {
+                  "can_edit": true,
+                  "can_award_emoji": true,
+                  "can_resolve": false,
+                  "can_resolve_discussion": false
+                },
+                "is_noteable_author": true,
+                "discussion_id": "fd73763cbcbf7b29eb8765d969a38f7d735e222a",
+                "emoji_awardable": true,
+                "report_abuse_path": "/gitlab-qa-bot/...",
+                "noteable_note_url": "https://staging.gitlab.com/gitlab-qa-bot/...",
+                "cached_markdown_version": 1900552,
+                "human_access": "Maintainer",
+                "is_contributor": false,
+                "project_name": "contract-testing",
+                "path": "/gitlab-qa-bot/..."
+              }
+            ],
+            "resolved": true
+          }
+        ],
+        "matchingRules": {
+          "$.body": {
+            "min": 1
+          },
+          "$.body[*].*": {
+            "match": "type"
+          },
+          "$.body[*].id": {
+            "match": "type"
+          },
+          "$.body[*].reply_id": {
+            "match": "type"
+          },
+          "$.body[*].project_id": {
+            "match": "type"
+          },
+          "$.body[*].confidential": {
+            "match": "type"
+          },
+          "$.body[*].diff_discussion": {
+            "match": "type"
+          },
+          "$.body[*].expanded": {
+            "match": "type"
+          },
+          "$.body[*].for_commit": {
+            "match": "type"
+          },
+          "$.body[*].individual_note": {
+            "match": "type"
+          },
+          "$.body[*].resolvable": {
+            "match": "type"
+          },
+          "$.body[*].resolved_by_push": {
+            "match": "type"
+          },
+          "$.body[*].notes": {
+            "min": 1
+          },
+          "$.body[*].notes[*].*": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].id": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].author.id": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].author.username": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].author.name": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].author.state": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].author.avatar_url": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].author.show_status": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].author.path": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].created_at": {
+            "match": "regex",
+            "regex": "^\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d\\.\\d+([+-][0-2]\\d(:?[0-5]\\d)?|Z)$"
+          },
+          "$.body[*].notes[*].updated_at": {
+            "match": "regex",
+            "regex": "^\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d\\.\\d+([+-][0-2]\\d(:?[0-5]\\d)?|Z)$"
+          },
+          "$.body[*].notes[*].system": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].noteable_id": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].noteable_type": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].resolvable": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].resolved": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].confidential": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].noteable_iid": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].note": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].note_html": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].current_user.can_edit": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].current_user.can_award_emoji": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].current_user.can_resolve": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].current_user.can_resolve_discussion": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].is_noteable_author": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].discussion_id": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].emoji_awardable": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].report_abuse_path": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].noteable_note_url": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].cached_markdown_version": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].human_access": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].is_contributor": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].project_name": {
+            "match": "type"
+          },
+          "$.body[*].notes[*].path": {
+            "match": "type"
+          },
+          "$.body[*].resolved": {
+            "match": "type"
+          }
+        }
+      }
+    }
+  ],
+  "metadata": {
+    "pactSpecification": {
+      "version": "2.0.0"
+    }
+  }
+}
diff --git a/spec/contracts/contracts/merge_request_page-merge_request_metadata_endpoint.json b/spec/contracts/contracts/merge_request_page-merge_request_metadata_endpoint.json
new file mode 100644
index 00000000000..eb22b7d2e3c
--- /dev/null
+++ b/spec/contracts/contracts/merge_request_page-merge_request_metadata_endpoint.json
@@ -0,0 +1,223 @@
+{
+  "consumer": {
+    "name": "Merge Request Page"
+  },
+  "provider": {
+    "name": "Merge Request Metadata Endpoint"
+  },
+  "interactions": [
+    {
+      "description": "a request for Metadata",
+      "providerState": "a merge request exists",
+      "request": {
+        "method": "GET",
+        "path": "/gitlab-org/gitlab-qa/-/merge_requests/1/diffs_metadata.json",
+        "headers": {
+          "Accept": "*/*"
+        }
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "Content-Type": "application/json; charset=utf-8"
+        },
+        "body": {
+          "real_size": "1",
+          "size": 1,
+          "branch_name": "testing-branch-1",
+          "source_branch_exists": true,
+          "target_branch_name": "master",
+          "merge_request_diff": {
+            "created_at": "2022-02-17T11:47:08.804Z",
+            "commits_count": 1,
+            "latest": true,
+            "short_commit_sha": "aee1ffec",
+            "base_version_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773",
+            "head_version_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_head=true",
+            "version_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773",
+            "compare_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773&start_sha=aee1ffec2299c0cfb17c8821e931339b73a3759f"
+          },
+          "latest_diff": true,
+          "latest_version_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs",
+          "added_lines": 1,
+          "removed_lines": 1,
+          "render_overflow_warning": false,
+          "email_patch_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1.patch",
+          "plain_diff_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1.diff",
+          "merge_request_diffs": [
+            {
+              "commits_count": 1,
+              "latest": true,
+              "short_commit_sha": "aee1ffec",
+              "base_version_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773",
+              "head_version_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_head=true",
+              "version_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773",
+              "compare_path": "/gitlab-qa-bot/contract-testing/-/merge_requests/1/diffs?diff_id=10581773&start_sha=aee1ffec2299c0cfb17c8821e931339b73a3759f"
+            }
+          ],
+          "definition_path_prefix": "/gitlab-qa-bot/contract-testing/-/blob/aee1ffec2299c0cfb17c8821e931339b73a3759f",
+          "diff_files": [
+            {
+              "added_lines": 1,
+              "removed_lines": 1,
+              "new_path": "Gemfile",
+              "old_path": "Gemfile",
+              "new_file": false,
+              "deleted_file": false,
+              "submodule": false,
+              "file_identifier_hash": "67d82b8716a5b6c52c7abf0b2cd99c7594ed3587",
+              "file_hash": "de3150c01c3a946a6168173c4116741379fe3579"
+            }
+          ],
+          "has_conflicts": false,
+          "can_merge": false,
+          "project_path": "gitlab-qa-bot/contract-testing",
+          "project_name": "contract-testing"
+        },
+        "matchingRules": {
+          "$.body.real_size": {
+            "match": "type"
+          },
+          "$.body.size": {
+            "match": "type"
+          },
+          "$.body.branch_name": {
+            "match": "type"
+          },
+          "$.body.source_branch_exists": {
+            "match": "type"
+          },
+          "$.body.target_branch_name": {
+            "match": "type"
+          },
+          "$.body.merge_request_diff.created_at": {
+            "match": "regex",
+            "regex": "^\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d\\.\\d+([+-][0-2]\\d(:?[0-5]\\d)?|Z)$"
+          },
+          "$.body.merge_request_diff.commits_count": {
+            "match": "type"
+          },
+          "$.body.merge_request_diff.latest": {
+            "match": "type"
+          },
+          "$.body.merge_request_diff.short_commit_sha": {
+            "match": "type"
+          },
+          "$.body.merge_request_diff.base_version_path": {
+            "match": "type"
+          },
+          "$.body.merge_request_diff.head_version_path": {
+            "match": "type"
+          },
+          "$.body.merge_request_diff.version_path": {
+            "match": "type"
+          },
+          "$.body.merge_request_diff.compare_path": {
+            "match": "type"
+          },
+          "$.body.latest_diff": {
+            "match": "type"
+          },
+          "$.body.latest_version_path": {
+            "match": "type"
+          },
+          "$.body.added_lines": {
+            "match": "type"
+          },
+          "$.body.removed_lines": {
+            "match": "type"
+          },
+          "$.body.render_overflow_warning": {
+            "match": "type"
+          },
+          "$.body.email_patch_path": {
+            "match": "type"
+          },
+          "$.body.plain_diff_path": {
+            "match": "type"
+          },
+          "$.body.merge_request_diffs": {
+            "min": 1
+          },
+          "$.body.merge_request_diffs[*].*": {
+            "match": "type"
+          },
+          "$.body.merge_request_diffs[*].commits_count": {
+            "match": "type"
+          },
+          "$.body.merge_request_diffs[*].latest": {
+            "match": "type"
+          },
+          "$.body.merge_request_diffs[*].short_commit_sha": {
+            "match": "type"
+          },
+          "$.body.merge_request_diffs[*].base_version_path": {
+            "match": "type"
+          },
+          "$.body.merge_request_diffs[*].head_version_path": {
+            "match": "type"
+          },
+          "$.body.merge_request_diffs[*].version_path": {
+            "match": "type"
+          },
+          "$.body.merge_request_diffs[*].compare_path": {
+            "match": "type"
+          },
+          "$.body.definition_path_prefix": {
+            "match": "type"
+          },
+          "$.body.diff_files": {
+            "min": 1
+          },
+          "$.body.diff_files[*].*": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].added_lines": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].removed_lines": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].new_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].old_path": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].new_file": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].deleted_file": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].submodule": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].file_identifier_hash": {
+            "match": "type"
+          },
+          "$.body.diff_files[*].file_hash": {
+            "match": "type"
+          },
+          "$.body.has_conflicts": {
+            "match": "type"
+          },
+          "$.body.can_merge": {
+            "match": "type"
+          },
+          "$.body.project_path": {
+            "match": "type"
+          },
+          "$.body.project_name": {
+            "match": "type"
+          }
+        }
+      }
+    }
+  ],
+  "metadata": {
+    "pactSpecification": {
+      "version": "2.0.0"
+    }
+  }
+}
diff --git a/spec/contracts/provider/environments/test.rb b/spec/contracts/provider/environments/test.rb
new file mode 100644
index 00000000000..6efb19508d8
--- /dev/null
+++ b/spec/contracts/provider/environments/test.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+module Provider
+  module Environments
+    class Test
+      def self.app
+        Rack::Builder.app do
+          map "/" do
+            run Gitlab::Application
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/contracts/provider/helpers/users_helper.rb b/spec/contracts/provider/helpers/users_helper.rb
new file mode 100644
index 00000000000..1982bd9cfd2
--- /dev/null
+++ b/spec/contracts/provider/helpers/users_helper.rb
@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+module Provider
+  module UsersHelper
+    CONTRACT_USER_NAME = "Contract Test User"
+  end
+end
diff --git a/spec/contracts/provider/spec_helper.rb b/spec/contracts/provider/spec_helper.rb
new file mode 100644
index 00000000000..6009d6524e1
--- /dev/null
+++ b/spec/contracts/provider/spec_helper.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require 'zeitwerk'
+require_relative 'helpers/users_helper'
+
+RSpec.configure do |config|
+  config.include Devise::Test::IntegrationHelpers
+  config.include FactoryBot::Syntax::Methods
+
+  config.before do
+    user = create(:user, name: Provider::UsersHelper::CONTRACT_USER_NAME).tap do |user|
+      user.current_sign_in_at = Time.current
+    end
+
+    sign_in user
+  end
+end
+
+Pact.configure do |config|
+  config.include FactoryBot::Syntax::Methods
+end
+
+module SpecHelper
+  require_relative '../../../config/bundler_setup'
+  Bundler.require(:default)
+
+  root = File.expand_path('../', __dir__)
+
+  loader = Zeitwerk::Loader.new
+  loader.push_dir(root)
+
+  loader.ignore("#{root}/consumer")
+  loader.ignore("#{root}/contracts")
+
+  loader.collapse("#{root}/provider/spec")
+
+  loader.setup
+end
diff --git a/spec/contracts/provider/specs/diffs_helper.rb b/spec/contracts/provider/specs/diffs_helper.rb
new file mode 100644
index 00000000000..24bdd00dbae
--- /dev/null
+++ b/spec/contracts/provider/specs/diffs_helper.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+require_relative '../spec_helper'
+require_relative '../states/diffs_state'
+
+module Provider
+  module DiffsHelper
+    Pact.service_provider "Merge Request Diffs Endpoint" do
+      app { Environments::Test.app }
+
+      honours_pact_with 'Merge Request Page' do
+        pact_uri '../contracts/merge_request_page-merge_request_diffs_endpoint.json'
+      end
+    end
+  end
+end
diff --git a/spec/contracts/provider/specs/discussions_helper.rb b/spec/contracts/provider/specs/discussions_helper.rb
new file mode 100644
index 00000000000..135ccf48276
--- /dev/null
+++ b/spec/contracts/provider/specs/discussions_helper.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+require_relative '../spec_helper'
+require_relative '../states/discussions_state'
+
+module Provider
+  module DiscussionsHelper
+    Pact.service_provider "Merge Request Discussions Endpoint" do
+      app { Environments::Test.app }
+
+      honours_pact_with 'Merge Request Page' do
+        pact_uri '../contracts/merge_request_page-merge_request_discussions_endpoint.json'
+      end
+    end
+  end
+end
diff --git a/spec/contracts/provider/specs/metadata_helper.rb b/spec/contracts/provider/specs/metadata_helper.rb
new file mode 100644
index 00000000000..e73b993a31a
--- /dev/null
+++ b/spec/contracts/provider/specs/metadata_helper.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+require_relative '../spec_helper'
+require_relative '../states/metadata_state'
+
+module Provider
+  module MetadataHelper
+    Pact.service_provider "Merge Request Metadata Endpoint" do
+      app { Environments::Test.app }
+
+      honours_pact_with 'Merge Request Page' do
+        pact_uri '../contracts/merge_request_page-merge_request_metadata_endpoint.json'
+      end
+    end
+  end
+end
diff --git a/spec/contracts/provider/states/diffs_state.rb b/spec/contracts/provider/states/diffs_state.rb
new file mode 100644
index 00000000000..d959cde5f5e
--- /dev/null
+++ b/spec/contracts/provider/states/diffs_state.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+Pact.provider_states_for "Merge Request Page" do
+  provider_state "a merge request with diffs exists" do
+    set_up do
+      user = User.find_by(name: Provider::UsersHelper::CONTRACT_USER_NAME)
+      namespace = create(:namespace, name: 'gitlab-org')
+      project = create(:project, :custom_repo, name: 'gitlab-qa', namespace: namespace, files: {})
+
+      project.add_maintainer(user)
+
+      merge_request = create(:merge_request_with_multiple_diffs, source_project: project)
+      merge_request_diff = create(:merge_request_diff, merge_request: merge_request)
+
+      create(:merge_request_diff_file, :new_file, merge_request_diff: merge_request_diff)
+    end
+  end
+end
diff --git a/spec/contracts/provider/states/discussions_state.rb b/spec/contracts/provider/states/discussions_state.rb
new file mode 100644
index 00000000000..ddbcf80f2c8
--- /dev/null
+++ b/spec/contracts/provider/states/discussions_state.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+Pact.provider_states_for "Merge Request Page" do
+  provider_state "a merge request with discussions exists" do
+    set_up do
+      user = User.find_by(name: Provider::UsersHelper::CONTRACT_USER_NAME)
+      namespace = create(:namespace, name: 'gitlab-org')
+      project = create(:project, name: 'gitlab-qa', namespace: namespace)
+
+      project.add_maintainer(user)
+
+      merge_request = create(:merge_request_with_diffs, source_project: project, author: user)
+
+      create(:discussion_note_on_merge_request, noteable: merge_request, project: project, author: user)
+    end
+  end
+end
diff --git a/spec/contracts/provider/states/metadata_state.rb b/spec/contracts/provider/states/metadata_state.rb
new file mode 100644
index 00000000000..59b290ce2fe
--- /dev/null
+++ b/spec/contracts/provider/states/metadata_state.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+Pact.provider_states_for "Merge Request Page" do
+  provider_state "a merge request exists" do
+    set_up do
+      user = User.find_by(name: Provider::UsersHelper::CONTRACT_USER_NAME)
+      namespace = create(:namespace, name: 'gitlab-org')
+      project = create(:project, :custom_repo, name: 'gitlab-qa', namespace: namespace, files: {})
+
+      project.add_maintainer(user)
+
+      merge_request = create(:merge_request, source_project: project)
+      merge_request_diff = create(:merge_request_diff, merge_request: merge_request)
+
+      create(:merge_request_diff_file, :new_file, merge_request_diff: merge_request_diff)
+    end
+  end
+end