block-string: print multi line for trailing backslash

graphql · May 18, 2020 · 6a07b6a · 6a07b6a
1 parent e01cfa8
commit 6a07b6a
Show file tree

Hide file tree

Showing 3 changed files with 12 additions and 1 deletion.
diff --git a/src/language/__tests__/.blockString-test.js.swp b/src/language/__tests__/.blockString-test.js.swp
diff --git a/src/language/__tests__/blockString-test.js b/src/language/__tests__/blockString-test.js
@@ -155,6 +155,13 @@ describe('printBlockString', () => {
     );
   });
 
+  it('correctly prints single-line with trailing backslash', () => {
+    const str = 'backslash \\';
+
+    expect(printBlockString(str)).to.equal('"""\nbackslash \\\n"""');
+    expect(printBlockString(str, '', true)).to.equal('"""\nbackslash \\\n"""');
+  });
+
   it('correctly prints string with a first line indentation', () => {
     const str = joinLines(
       '    first  ',

diff --git a/src/language/blockString.js b/src/language/blockString.js
@@ -85,8 +85,12 @@ export function printBlockString(
   const isSingleLine = value.indexOf('\n') === -1;
   const hasLeadingSpace = value[0] === ' ' || value[0] === '\t';
   const hasTrailingQuote = value[value.length - 1] === '"';
+  const hasTrailingSlash = value[value.length - 1] === '\\';
   const printAsMultipleLines =
-    !isSingleLine || hasTrailingQuote || preferMultipleLines;
+    !isSingleLine ||
+    hasTrailingQuote ||
+    hasTrailingSlash ||
+    preferMultipleLines;
 
   let result = '';
   // Format a multi-line block quote to account for leading space.