printError shouldn't return trailing new line (#1983)

Author: IvanGoncharov

src/error/__tests__/printError-test.js

@@ -32,7 +32,7 @@ describe('printError', () => {
       new Source('*', 'Test', { line: 9, column: 1 }),
       [0],
     );
-    expect(printError(singleDigit)).to.equal(dedent`
+    expect(printError(singleDigit) + '\n').to.equal(dedent`
       Single digit line number with no padding
 
       Test:9:1
@@ -46,7 +46,7 @@ describe('printError', () => {
       new Source('*\n', 'Test', { line: 9, column: 1 }),
       [0],
     );
-    expect(printError(doubleDigit)).to.equal(dedent`
+    expect(printError(doubleDigit) + '\n').to.equal(dedent`
       Left padded first line number
 
       Test:9:1
@@ -90,7 +90,7 @@ describe('printError', () => {
       fieldB.type,
     ]);
 
-    expect(printError(error)).to.equal(dedent`
+    expect(printError(error) + '\n').to.equal(dedent`
       Example error with two nodes
 
       SourceA:2:10

src/error/printError.js

@@ -29,7 +29,7 @@ export function printError(error: GraphQLError): string {
   }
   return printedLocations.length === 0
     ? error.message
-    : [error.message, ...printedLocations].join('\n\n') + '\n';
+    : [error.message, ...printedLocations].join('\n\n');
 }
 
 /**

src/language/__tests__/lexer-test.js

@@ -118,7 +118,7 @@ describe('Lexer', () => {
     } catch (error) {
       caughtError = error;
     }
-    expect(String(caughtError)).to.equal(dedent`
+    expect(String(caughtError) + '\n').to.equal(dedent`
       Syntax Error: Cannot parse the unexpected character "?".
 
       GraphQL request:3:5
@@ -138,7 +138,7 @@ describe('Lexer', () => {
     } catch (error) {
       caughtError = error;
     }
-    expect(String(caughtError)).to.equal(dedent`
+    expect(String(caughtError) + '\n').to.equal(dedent`
       Syntax Error: Cannot parse the unexpected character "?".
 
       foo.js:13:6
@@ -157,7 +157,7 @@ describe('Lexer', () => {
     } catch (error) {
       caughtError = error;
     }
-    expect(String(caughtError)).to.equal(dedent`
+    expect(String(caughtError) + '\n').to.equal(dedent`
       Syntax Error: Cannot parse the unexpected character "?".
 
       foo.js:1:5

src/language/__tests__/parser-test.js

@@ -44,7 +44,7 @@ describe('Parser', () => {
       locations: [{ line: 1, column: 2 }],
     });
 
-    expect(String(caughtError)).to.equal(dedent`
+    expect(String(caughtError) + '\n').to.equal(dedent`
       Syntax Error: Expected Name, found <EOF>
 
       GraphQL request:1:2
@@ -81,7 +81,7 @@ describe('Parser', () => {
     } catch (error) {
       caughtError = error;
     }
-    expect(String(caughtError)).to.equal(dedent`
+    expect(String(caughtError) + '\n').to.equal(dedent`
       Syntax Error: Expected {, found <EOF>
 
       MyQuery.graphql:1:6

src/utilities/__tests__/stripIgnoredCharacters-test.js

@@ -82,16 +82,6 @@ function expectStripped(docString) {
     toStayTheSame() {
       this.toEqual(docString);
     },
-    toThrow(expectedStringifyError) {
-      let catchedError;
-
-      try {
-        stripIgnoredCharacters(docString);
-      } catch (e) {
-        catchedError = e;
-      }
-      expect(String(catchedError)).to.equal(expectedStringifyError);
-    },
   };
 
   function inspectStr(str) {
@@ -155,7 +145,15 @@ describe('stripIgnoredCharacters', () => {
   });
 
   it('report document with invalid token', () => {
-    expectStripped('{ foo(arg: "\n"').toThrow(dedent`
+    let catchedError;
+
+    try {
+      stripIgnoredCharacters('{ foo(arg: "\n"');
+    } catch (e) {
+      catchedError = e;
+    }
+
+    expect(String(catchedError) + '\n').to.equal(dedent`
       Syntax Error: Unterminated string.
 
       GraphQL request:1:13