Add tests for DependencyGraph

postcss · Oct 8, 2020 · 8c3339c · 8c3339c
1 parent 6181647
commit 8c3339c
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/lib/test/DependencyGraph.js b/lib/test/DependencyGraph.js
@@ -0,0 +1,20 @@
+'use strict'
+const test = require('ava')
+const path = require('path')
+const createDependencyGraph = require('../DependencyGraph.js')
+
+function resolveArray(arr) {
+  return arr.map((p) => path.resolve(p))
+}
+
+test('tracks dependencies', (t) => {
+  const graph = createDependencyGraph()
+  graph.add({ file: 'aa', parent: 'a' })
+  graph.add({ file: 'bb', parent: 'b' })
+  graph.add({ file: 'ab', parent: 'a' })
+  graph.add({ file: 'ab', parent: 'b' })
+  t.deepEqual(graph.dependantsOf('aa'), resolveArray(['a']))
+  t.deepEqual(graph.dependantsOf('bb'), resolveArray(['b']))
+  t.deepEqual(graph.dependantsOf('ab'), resolveArray(['a', 'b']))
+  t.deepEqual(graph.dependantsOf('nonexistent'), [])
+})