flow like the river

BACK_BACK/node_modules/@parcel/logger/test/prettyError.js

@@ -0,0 +1,104 @@
+const assert = require('assert');
+const prettyError = require('../src/prettyError');
+
+const message = 'Error Message!';
+const fileName = 'Test.js';
+const codeFrame = '<code>frame</code>';
+const stack =
+  'Error: Uh-oh. Something went wrong. Line 88. \n Oh no. Something else went wrong. Line 77 \n';
+
+describe('prettyError', () => {
+  it('should handle passing error as string', () => {
+    const err = prettyError(message);
+
+    assert.equal(err.message, message);
+    assert.equal(err.stack, undefined);
+  });
+
+  it('should handle passing error as object', () => {
+    const err = prettyError({message});
+
+    assert.equal(err.message, message);
+    assert.equal(err.stack, undefined);
+  });
+
+  it('should handle unknown input', () => {
+    const err = prettyError(Number.NaN);
+
+    assert(err.message.length); // non-empty error message
+    assert.equal(err.stack, undefined);
+  });
+
+  it('should prepend fileName', () => {
+    const err = prettyError({
+      message,
+      fileName
+    });
+
+    assert(err.message.startsWith(fileName));
+    assert.equal(err.stack, undefined);
+  });
+
+  it('should prepend line and column location', () => {
+    const err = prettyError({
+      message,
+      fileName,
+      loc: {
+        line: 1,
+        column: 10
+      }
+    });
+
+    assert(err.message.startsWith(`${fileName}:1:10`));
+    assert.equal(err.stack, undefined);
+  });
+
+  it('should support providing a codeFrame as stack', () => {
+    const err = prettyError({
+      message,
+      stack,
+      codeFrame: codeFrame
+    });
+
+    assert.equal(err.message, message);
+    assert.equal(err.stack, codeFrame);
+  });
+
+  it('should support highlightedCodeFrame when opts.color is true', () => {
+    let err = prettyError(
+      {
+        message,
+        stack,
+        codeFrame: '<not>a code frame</not>',
+        highlightedCodeFrame: codeFrame
+      },
+      {color: true}
+    );
+
+    assert.equal(err.message, message);
+    assert.equal(err.stack, codeFrame);
+
+    err = prettyError(
+      {
+        message,
+        stack,
+        codeFrame: codeFrame,
+        highlightedCodeFrame: '<not>a code frame</not>'
+      },
+      {color: false}
+    );
+
+    assert.equal(err.message, message);
+    assert.equal(err.stack, codeFrame);
+  });
+
+  it('should support stack', () => {
+    const err = prettyError({
+      message,
+      stack
+    });
+
+    assert.equal(err.message, message);
+    assert(err.stack.includes('Line'));
+  });
+});