File: parsePatchFile.test.ts

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import {parsePatchFile} from '../sources/tools/parse';

const patch = `diff --git a/banana.ts b/banana.ts
index 2de83dd..842652c 100644
--- a/banana.ts
+++ b/banana.ts
@@ -1,5 +1,5 @@
 this
 is

-a
+
 file
`;
const invalidHeaders1 = `diff --git a/banana.ts b/banana.ts
index 2de83dd..842652c 100644
--- a/banana.ts
+++ b/banana.ts
@@ -1,5 +1,4 @@
 this
 is

-a
+
 file
`;

const invalidHeaders2 = `diff --git a/banana.ts b/banana.ts
index 2de83dd..842652c 100644
--- a/banana.ts
+++ b/banana.ts
@@ -1,4 +1,5 @@
 this
 is

-a
+
 file
`;

const invalidHeaders3 = `diff --git a/banana.ts b/banana.ts
index 2de83dd..842652c 100644
--- a/banana.ts
+++ b/banana.ts
@@ -1,0 +1,5 @@
 this
 is

-a
+
 file
`;
const invalidHeaders4 = `diff --git a/banana.ts b/banana.ts
index 2de83dd..842652c 100644
--- a/banana.ts
+++ b/banana.ts
@@ -1,5 +1,0 @@
 this
 is

-a
+
 file
`;

const invalidHeaders5 = `diff --git a/banana.ts b/banana.ts
index 2de83dd..842652c 100644
--- a/banana.ts
+++ b/banana.ts
@@ -1,5 +1,5@@
 this
 is

-a
+
 file
`;

const accidentalBlankLine = `diff --git a/banana.ts b/banana.ts
index 2de83dd..842652c 100644
--- a/banana.ts
+++ b/banana.ts
@@ -1,5 +1,5 @@
 this
 is

-a
+
 file
`;

const crlfLineBreaks = `diff --git a/banana.ts b/banana.ts
new file mode 100644
index 0000000..3e1267f
--- /dev/null
+++ b/banana.ts
@@ -0,0 +1 @@
+this is a new file
`.replace(/\n/g, `\r\n`);

const modeChangeAndModifyAndRename = `diff --git a/numbers.txt b/banana.txt
old mode 100644
new mode 100755
similarity index 96%
rename from numbers.txt
rename to banana.txt
index fbf1785..92d2c5f
--- a/numbers.txt
+++ b/banana.txt
@@ -1,4 +1,4 @@
-one
+ne

 two

`;

describe(`parsepatchFile`, () => {
  it(`works for a simple case`, () => {
    expect(parsePatchFile(patch)).toMatchSnapshot();
  });

  it(`fails when the patch file has invalid headers`, () => {
    expect(() => parsePatchFile(invalidHeaders1)).toThrow();
    expect(() => parsePatchFile(invalidHeaders2)).toThrow();
    expect(() => parsePatchFile(invalidHeaders3)).toThrow();
    expect(() => parsePatchFile(invalidHeaders4)).toThrow();
    expect(() => parsePatchFile(invalidHeaders5)).toThrow();
  });

  it(`is OK when blank lines are accidentally created`, () => {
    expect(parsePatchFile(accidentalBlankLine)).toEqual(parsePatchFile(patch));
  });

  it(`can handle files with CRLF line breaks`, () => {
    expect(parsePatchFile(crlfLineBreaks)).toMatchSnapshot();
  });

  it(`works`, () => {
    expect(parsePatchFile(modeChangeAndModifyAndRename)).toMatchSnapshot();

    expect(parsePatchFile(accidentalBlankLine)).toMatchSnapshot();
    expect(parsePatchFile(modeChangeAndModifyAndRename)).toMatchSnapshot();
  });
});