add linting (and some initial fixes)

1 files changed, 145 insertions, 0 deletions

diff --git a/node_modules/jest-diff/build/diffStrings.js b/node_modules/jest-diff/build/diffStrings.js
new file mode 100644
index 000000000..6961ff801
--- /dev/null
+++ b/node_modules/jest-diff/build/diffStrings.js
@@ -0,0 +1,145 @@
+/**
+ * Copyright (c) 2014, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * 
+ */
+
+'use strict';
+
+const chalk = require('chalk');
+const diff = require('diff');var _require =
+
+require('./constants.js');const NO_DIFF_MESSAGE = _require.NO_DIFF_MESSAGE;
+const DIFF_CONTEXT = 5;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+const getColor = (added, removed) =>
+added ?
+chalk.red :
+removed ? chalk.green : chalk.dim;
+
+const getBgColor = (added, removed) =>
+added ?
+chalk.bgRed :
+removed ? chalk.bgGreen : chalk.dim;
+
+const highlightTrailingWhitespace = (line, bgColor) =>
+line.replace(/\s+$/, bgColor('$&'));
+
+const getAnnotation = options =>
+chalk.green('- ' + (options && options.aAnnotation || 'Expected')) + '\n' +
+chalk.red('+ ' + (options && options.bAnnotation || 'Received')) + '\n\n';
+
+const diffLines = (a, b) => {
+  let isDifferent = false;
+  return {
+    diff: diff.diffLines(a, b).map(part => {const
+      added = part.added,removed = part.removed;
+      if (part.added || part.removed) {
+        isDifferent = true;
+      }
+
+      const lines = part.value.split('\n');
+      const color = getColor(added, removed);
+      const bgColor = getBgColor(added, removed);
+
+      if (lines[lines.length - 1] === '') {
+        lines.pop();
+      }
+
+      return lines.map(line => {
+        const highlightedLine = highlightTrailingWhitespace(line, bgColor);
+        const mark = color(part.added ? '+' : part.removed ? '-' : ' ');
+        return mark + ' ' + color(highlightedLine) + '\n';
+      }).join('');
+    }).join('').trim(),
+    isDifferent };
+
+};
+
+// Only show patch marks ("@@ ... @@") if the diff is big.
+// To determine this, we need to compare either the original string (a) to
+// `hunk.oldLines` or a new string to `hunk.newLines`.
+// If the `oldLinesCount` is greater than `hunk.oldLines`
+// we can be sure that at least 1 line has been "hidden".
+const shouldShowPatchMarks =
+(hunk, oldLinesCount) => oldLinesCount > hunk.oldLines;
+
+const createPatchMark = hunk => {
+  const markOld = `-${hunk.oldStart},${hunk.oldLines}`;
+  const markNew = `+${hunk.newStart},${hunk.newLines}`;
+  return chalk.yellow(`@@ ${markOld} ${markNew} @@\n`);
+};
+
+const structuredPatch = (a, b) => {
+  const options = { context: DIFF_CONTEXT };
+  let isDifferent = false;
+  // Make sure the strings end with a newline.
+  if (!a.endsWith('\n')) {
+    a += '\n';
+  }
+  if (!b.endsWith('\n')) {
+    b += '\n';
+  }
+
+  const oldLinesCount = (a.match(/\n/g) || []).length;
+
+  return {
+    diff: diff.structuredPatch('', '', a, b, '', '', options).
+    hunks.map(hunk => {
+      const lines = hunk.lines.map(line => {
+        const added = line[0] === '+';
+        const removed = line[0] === '-';
+
+        const color = getColor(added, removed);
+        const bgColor = getBgColor(added, removed);
+
+        const highlightedLine = highlightTrailingWhitespace(line, bgColor);
+        return color(highlightedLine) + '\n';
+      }).join('');
+
+      isDifferent = true;
+      return shouldShowPatchMarks(hunk, oldLinesCount) ?
+      createPatchMark(hunk) + lines :
+      lines;
+    }).join('').trim(),
+    isDifferent };
+
+};
+
+function diffStrings(a, b, options) {
+  // `diff` uses the Myers LCS diff algorithm which runs in O(n+d^2) time
+  // (where "d" is the edit distance) and can get very slow for large edit
+  // distances. Mitigate the cost by switching to a lower-resolution diff
+  // whenever linebreaks are involved.
+  const result = options && options.expand === false ?
+  structuredPatch(a, b) :
+  diffLines(a, b);
+
+  if (result.isDifferent) {
+    return getAnnotation(options) + result.diff;
+  } else {
+    return NO_DIFF_MESSAGE;
+  }
+}
+
+module.exports = diffStrings;
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