1 files changed, 100 insertions, 0 deletions
diff --git a/test/lib/utils/log-shim.js b/test/lib/utils/log-shim.js
new file mode 100644
index 000000000..dee4efbaa
--- /dev/null
+++ b/test/lib/utils/log-shim.js
@@ -0,0 +1,100 @@
+const t = require('tap')
+
+const makeShim = (mocks) => t.mock('../../../lib/utils/log-shim.js', mocks)
+
+const loggers = [
+  'notice',
+  'error',
+  'warn',
+  'info',
+  'verbose',
+  'http',
+  'silly',
+  'pause',
+  'resume',
+]
+
+t.test('has properties', (t) => {
+  const shim = makeShim()
+
+  t.match(shim, {
+    level: String,
+    levels: {},
+    gauge: {},
+    stream: {},
+    heading: undefined,
+    enableColor: Function,
+    disableColor: Function,
+    enableUnicode: Function,
+    disableUnicode: Function,
+    enableProgress: Function,
+    disableProgress: Function,
+    ...loggers.reduce((acc, l) => {
+      acc[l] = Function
+      return acc
+    }, {}),
+  })
+
+  t.match(Object.keys(shim).sort(), [
+    'level',
+    'heading',
+    'levels',
+    'gauge',
+    'stream',
+    'tracker',
+    'useColor',
+    'enableColor',
+    'disableColor',
+    'enableUnicode',
+    'disableUnicode',
+    'enableProgress',
+    'disableProgress',
+    'progressEnabled',
+    'clearProgress',
+    'showProgress',
+    'newItem',
+    'newGroup',
+    ...loggers,
+  ].sort())
+
+  t.end()
+})
+
+t.test('works with npmlog/proclog proxy', t => {
+  const procLog = { silly: () => 'SILLY' }
+  const npmlog = { level: 'woo', enableColor: () => true }
+  const shim = makeShim({ npmlog, 'proc-log': procLog })
+
+  t.equal(shim.level, 'woo', 'can get a property')
+
+  npmlog.level = 'hey'
+  t.strictSame(
+    [shim.level, npmlog.level],
+    ['hey', 'hey'],
+    'can get a property after update on npmlog'
+  )
+
+  shim.level = 'test'
+  t.strictSame(
+    [shim.level, npmlog.level],
+    ['test', 'test'],
+    'can get a property after update on shim'
+  )
+
+  t.ok(shim.enableColor(), 'can call method on shim to call npmlog')
+  t.equal(shim.silly(), 'SILLY', 'can call method on proclog')
+  t.notOk(shim.LEVELS, 'only includes levels from npmlog')
+  t.throws(() => shim.gauge = 100, 'cant set getters properies')
+
+  t.end()
+})
+
+t.test('works with npmlog/proclog proxy', t => {
+  const shim = makeShim()
+
+  loggers.forEach((k) => {
+    t.doesNotThrow(() => shim[k]('test'))
+  })
+
+  t.end()
+})