t.assert asserts properties

dmonad · Feb 25, 2023 · 69c2a58 · 69c2a58
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diff --git a/deno.json b/deno.json
@@ -0,0 +1,7 @@
+{
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+    "lib0/crypto": "./crypto.js",
+    "lib0/webcrypto": "./webcrypto.deno.js"
+  }
+}
diff --git a/deno.lock b/deno.lock
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+    "https://deno.land/std@0.177.0/node/internal_binding/constants.ts": "21ff9d1ee71d0a2086541083a7711842fc6ae25e264dbf45c73815aadce06f4c",
+    "https://deno.land/std@0.177.0/node/internal_binding/crypto.ts": "29e8f94f283a2e7d4229d3551369c6a40c2af9737fad948cb9be56bef6c468cd",
+    "https://deno.land/std@0.177.0/node/internal_binding/node_options.ts": "0b5cb0bf4379a39278d7b7bb6bb2c2751baf428fe437abe5ed3e8441fae1f18b",
+    "https://deno.land/std@0.177.0/node/internal_binding/string_decoder.ts": "54c3c1cbd5a9254881be58bf22637965dc69535483014dab60487e299cb95445",
+    "https://deno.land/std@0.177.0/node/internal_binding/types.ts": "2187595a58d2cf0134f4db6cc2a12bf777f452f52b15b6c3aed73fa072aa5fc3",
+    "https://deno.land/std@0.177.0/node/internal_binding/util.ts": "808ff3b92740284184ab824adfc420e75398c88c8bccf5111f0c24ac18c48f10",
+    "https://deno.land/std@0.177.0/node/internal_binding/uv.ts": "eb0048e30af4db407fb3f95563e30d70efd6187051c033713b0a5b768593a3a3",
+    "https://deno.land/std@0.177.0/node/perf_hooks.ts": "c20e1f02f463e065e8f6c1d4fa97b0d3832dc0db5b5d8ea37f99a962ecf11f35",
+    "https://deno.land/std@0.177.0/node/stream.ts": "09e348302af40dcc7dc58aa5e40fdff868d11d8d6b0cfb85cbb9c75b9fe450c7",
+    "https://deno.land/std@0.177.0/node/string_decoder.ts": "1a17e3572037c512cc5fc4b29076613e90f225474362d18da908cb7e5ccb7e88"
+  }
+}
diff --git a/encoding.test.js b/encoding.test.js
@@ -489,6 +489,9 @@ const encodingPairs = [
 export const testRepeatRandomWrites = tc => {
   t.describe(`Writing ${loops} random values`, `defLen=${defLen}`)
   const gen = tc.prng
+  /**
+   * @type {any}
+   */
   const ops = []
   const encoder = encoding.createEncoder()
   for (let i = 0; i < 10000; i++) {

diff --git a/list.test.js b/list.test.js
@@ -12,9 +12,9 @@ class QueueItem extends list.ListNode {
 }
 
 /**
- * @param {t.TestCase} tc
+ * @param {t.TestCase} _tc
  */
-export const testEnqueueDequeue = tc => {
+export const testEnqueueDequeue = _tc => {
   const N = 30
   /**
    * @type {list.List<QueueItem>}
@@ -45,9 +45,9 @@ export const testEnqueueDequeue = tc => {
 }
 
 /**
- * @param {t.TestCase} tc
+ * @param {t.TestCase} _tc
  */
-export const testSelectivePop = tc => {
+export const testSelectivePop = _tc => {
   /**
    * @type {list.List<QueueItem>}
    */

diff --git a/testing.js b/testing.js
@@ -511,12 +511,14 @@ const _compare = (a, b, path, message, customCompare) => {
 export const compare = (a, b, message = null, customCompare = compareValues) => _compare(a, b, 'obj', message, customCompare)
 
 /**
- * @param {boolean} condition
+ * @template T
+ * @param {T} property
  * @param {string?} [message]
+ * @return {asserts property is NonNullable<T>}
  * @throws {TestError}
  */
 /* c8 ignore next */
-export const assert = (condition, message = null) => condition || fail(`Assertion failed${message !== null ? `: ${message}` : ''}`)
+export const assert = (property, message = null) => { property || fail(`Assertion failed${message !== null ? `: ${message}` : ''}`) }
 
 /**
  * @param {function():Promise<any>} f

diff --git a/testing.test.js b/testing.test.js
@@ -10,6 +10,14 @@ export const nottestingNotTested = () => {
   t.assert(false, 'This test should not be executed because the name doesnt start with "test"')
 }
 
+export const testAssertTyping = () => {
+  const q = Math.random()
+  const x = q === 0.3 ? { a: 4 } : null
+  // t.assert(x.a === 4) - this will give a type error because the type is uncertain
+  t.assert(x)
+  t.assert(x.a === 4) // this works because x is asserted
+}
+
 /**
  * @param {t.TestCase} _tc
  */

diff --git a/webcrypto.deno.js b/webcrypto.deno.js
@@ -0,0 +1,4 @@
+// eslint-disable-next-line
+export const subtle = /** @type {any} */ (crypto).subtle
+// eslint-disable-next-line
+export const getRandomValues = /** @type {any} */ (crypto).getRandomValues.bind(crypto)