Escape symbol strings

Ensure they do not contain linebreaks. Fixes #5.

lib/primitiveValues/symbol.js

@@ -1,5 +1,6 @@
 'use strict'
 
+const stringEscape = require('js-string-escape')
 const wellKnownSymbols = require('well-known-symbols')
 
 const constants = require('../constants')
@@ -14,7 +15,7 @@ function describe (value) {
 
   const key = Symbol.keyFor(value)
   if (key !== undefined) {
-    stringCompare = `Symbol.for(${key})`
+    stringCompare = `Symbol.for(${stringEscape(key)})`
   } else if (wellKnownSymbols.isWellKnown(value)) {
     stringCompare = wellKnownSymbols.getLabel(value)
   }
@@ -63,8 +64,7 @@ class SymbolValue {
 
   formatString () {
     if (this.stringCompare !== null) return this.stringCompare
-    // TODO: Properly indent symbols that stringify to multiple lines
-    return this.value.toString()
+    return stringEscape(this.value.toString())
   }
 
   formatDeep (theme) {

package.json

@@ -30,6 +30,7 @@
     "esutils": "^2.0.2",
     "fast-diff": "^1.1.1",
     "function-name-support": "^0.2.0",
+    "js-string-escape": "^1.0.1",
     "lodash.clonedeep": "^4.5.0",
     "lodash.flattendeep": "^4.4.0",
     "lodash.merge": "^4.6.0",

test/__snapshots__/format.js.snap

@@ -475,8 +475,12 @@ exports[`formats primitive: Symbol(Symbol.iterator) 1`] = `"%symbol.open%Symbol.
 
 exports[`formats primitive: Symbol(bar) 1`] = `"%symbol.open%Symbol.for(bar)%symbol.close%"`;
 
+exports[`formats primitive: Symbol(bar\\nbaz) 1`] = `"%symbol.open%Symbol.for(bar\\\\nbaz)%symbol.close%"`;
+
 exports[`formats primitive: Symbol(foo) 1`] = `"%symbol.open%Symbol(foo)%symbol.close%"`;
 
+exports[`formats primitive: Symbol(foo\\nbar) 1`] = `"%symbol.open%Symbol(foo\\\\nbar)%symbol.close%"`;
+
 exports[`formats primitive: false 1`] = `"%boolean.open%false%boolean.close%"`;
 
 exports[`formats primitive: foo 1`] = `"%string.line.open#'%%string.open%foo%string.close%%string.line.close#'%"`;

test/format.js

@@ -55,7 +55,9 @@ void (
     NaN,
     Symbol(), // eslint-disable-line symbol-description
     Symbol('foo'),
+    Symbol('foo\nbar'),
     Symbol.for('bar'),
+    Symbol.for('bar\nbaz'),
     Symbol.iterator
   ]) {
     test(formatsPrimitive, value)