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node_modules/jest-diff/build/joinAlignedDiffs.js

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+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.joinAlignedDiffsExpand = exports.joinAlignedDiffsNoExpand = void 0;
+
+var _cleanupSemantic = require('./cleanupSemantic');
+
+var _printDiffs = require('./printDiffs');
+
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+const DIFF_CONTEXT_DEFAULT = 5; // same as diffLines
+// jest --no-expand
+//
+// Given array of aligned strings with inverse highlight formatting,
+// return joined lines with diff formatting (and patch marks, if needed).
+
+const joinAlignedDiffsNoExpand = (
+  diffs,
+  nContextLines = DIFF_CONTEXT_DEFAULT
+) => {
+  const iLength = diffs.length;
+  const nContextLines2 = nContextLines + nContextLines; // First pass: count output lines and see if it has patches.
+
+  let jLength = iLength;
+  let hasExcessAtStartOrEnd = false;
+  let nExcessesBetweenChanges = 0;
+  let i = 0;
+
+  while (i !== iLength) {
+    const iStart = i;
+
+    while (i !== iLength && diffs[i][0] === _cleanupSemantic.DIFF_EQUAL) {
+      i += 1;
+    }
+
+    if (iStart !== i) {
+      if (iStart === 0) {
+        // at start
+        if (i > nContextLines) {
+          jLength -= i - nContextLines; // subtract excess common lines
+
+          hasExcessAtStartOrEnd = true;
+        }
+      } else if (i === iLength) {
+        // at end
+        const n = i - iStart;
+
+        if (n > nContextLines) {
+          jLength -= n - nContextLines; // subtract excess common lines
+
+          hasExcessAtStartOrEnd = true;
+        }
+      } else {
+        // between changes
+        const n = i - iStart;
+
+        if (n > nContextLines2) {
+          jLength -= n - nContextLines2; // subtract excess common lines
+
+          nExcessesBetweenChanges += 1;
+        }
+      }
+    }
+
+    while (i !== iLength && diffs[i][0] !== _cleanupSemantic.DIFF_EQUAL) {
+      i += 1;
+    }
+  }
+
+  const hasPatch = nExcessesBetweenChanges !== 0 || hasExcessAtStartOrEnd;
+
+  if (nExcessesBetweenChanges !== 0) {
+    jLength += nExcessesBetweenChanges + 1; // add patch lines
+  } else if (hasExcessAtStartOrEnd) {
+    jLength += 1; // add patch line
+  }
+
+  const jLast = jLength - 1;
+  const lines = [];
+  let jPatchMark = 0; // index of placeholder line for current patch mark
+
+  if (hasPatch) {
+    lines.push(''); // placeholder line for first patch mark
+  } // Indexes of expected or received lines in current patch:
+
+  let aStart = 0;
+  let bStart = 0;
+  let aEnd = 0;
+  let bEnd = 0;
+
+  const pushCommonLine = line => {
+    const j = lines.length;
+    lines.push((0, _printDiffs.printCommonLine)(line, j === 0 || j === jLast));
+    aEnd += 1;
+    bEnd += 1;
+  };
+
+  const pushDeleteLine = line => {
+    lines.push((0, _printDiffs.printDeleteLine)(line));
+    aEnd += 1;
+  };
+
+  const pushInsertLine = line => {
+    lines.push((0, _printDiffs.printInsertLine)(line));
+    bEnd += 1;
+  }; // Second pass: push lines with diff formatting (and patch marks, if needed).
+
+  i = 0;
+
+  while (i !== iLength) {
+    let iStart = i;
+
+    while (i !== iLength && diffs[i][0] === _cleanupSemantic.DIFF_EQUAL) {
+      i += 1;
+    }
+
+    if (iStart !== i) {
+      if (iStart === 0) {
+        // at beginning
+        if (i > nContextLines) {
+          iStart = i - nContextLines;
+          aStart = iStart;
+          bStart = iStart;
+          aEnd = aStart;
+          bEnd = bStart;
+        }
+
+        for (let iCommon = iStart; iCommon !== i; iCommon += 1) {
+          pushCommonLine(diffs[iCommon][1]);
+        }
+      } else if (i === iLength) {
+        // at end
+        const iEnd = i - iStart > nContextLines ? iStart + nContextLines : i;
+
+        for (let iCommon = iStart; iCommon !== iEnd; iCommon += 1) {
+          pushCommonLine(diffs[iCommon][1]);
+        }
+      } else {
+        // between changes
+        const nCommon = i - iStart;
+
+        if (nCommon > nContextLines2) {
+          const iEnd = iStart + nContextLines;
+
+          for (let iCommon = iStart; iCommon !== iEnd; iCommon += 1) {
+            pushCommonLine(diffs[iCommon][1]);
+          }
+
+          lines[jPatchMark] = (0, _printDiffs.createPatchMark)(
+            aStart,
+            aEnd,
+            bStart,
+            bEnd
+          );
+          jPatchMark = lines.length;
+          lines.push(''); // placeholder line for next patch mark
+
+          const nOmit = nCommon - nContextLines2;
+          aStart = aEnd + nOmit;
+          bStart = bEnd + nOmit;
+          aEnd = aStart;
+          bEnd = bStart;
+
+          for (let iCommon = i - nContextLines; iCommon !== i; iCommon += 1) {
+            pushCommonLine(diffs[iCommon][1]);
+          }
+        } else {
+          for (let iCommon = iStart; iCommon !== i; iCommon += 1) {
+            pushCommonLine(diffs[iCommon][1]);
+          }
+        }
+      }
+    }
+
+    while (i !== iLength && diffs[i][0] === _cleanupSemantic.DIFF_DELETE) {
+      pushDeleteLine(diffs[i][1]);
+      i += 1;
+    }
+
+    while (i !== iLength && diffs[i][0] === _cleanupSemantic.DIFF_INSERT) {
+      pushInsertLine(diffs[i][1]);
+      i += 1;
+    }
+  }
+
+  if (hasPatch) {
+    lines[jPatchMark] = (0, _printDiffs.createPatchMark)(
+      aStart,
+      aEnd,
+      bStart,
+      bEnd
+    );
+  }
+
+  return lines.join('\n');
+}; // jest --expand
+//
+// Given array of aligned strings with inverse highlight formatting,
+// return joined lines with diff formatting.
+
+exports.joinAlignedDiffsNoExpand = joinAlignedDiffsNoExpand;
+
+const joinAlignedDiffsExpand = diffs =>
+  diffs
+    .map((diff, i, diffs) => {
+      const line = diff[1];
+
+      switch (diff[0]) {
+        case _cleanupSemantic.DIFF_DELETE:
+          return (0, _printDiffs.printDeleteLine)(line);
+
+        case _cleanupSemantic.DIFF_INSERT:
+          return (0, _printDiffs.printInsertLine)(line);
+
+        default:
+          return (0, _printDiffs.printCommonLine)(
+            line,
+            i === 0 || i === diffs.length - 1
+          );
+      }
+    })
+    .join('\n');
+
+exports.joinAlignedDiffsExpand = joinAlignedDiffsExpand;