Include the unrecognized string in the error message

alcuadrado · alcuadrado · commit 0a96299da84a · 2019-05-09T15:28:37.000-03:00
diff --git a/src/bytes.ts b/src/bytes.ts
@@ -76,7 +76,7 @@ export const toBuffer = function(v: any): Buffer {
         v = Buffer.from(ethjsUtil.padToEven(ethjsUtil.stripHexPrefix(v)), 'hex')
       } else {
         throw new Error(
-          'Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings.',
+          `Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings and this string was given: ${v}`,
         )
       }
     } else if (typeof v === 'number') {
diff --git a/test/index.js b/test/index.js
@@ -703,10 +703,9 @@ describe('toBuffer', function() {
   })
 
   it('should fail with non 0x-prefixed hex strings', function() {
-    assert.throws(() => ethUtils.toBuffer('11'))
+    assert.throws(() => ethUtils.toBuffer('11'), '11')
     assert.throws(() => ethUtils.toBuffer(''))
-
-    assert.throws(() => ethUtils.toBuffer('0xR'))
+    assert.throws(() => ethUtils.toBuffer('0xR'), '0xR')
   })
 })
 

Original file line number	Diff line number	Diff line change
`@@ -76,7 +76,7 @@ export const toBuffer = function(v: any): Buffer {`
`76`	`76`	`v = Buffer.from(ethjsUtil.padToEven(ethjsUtil.stripHexPrefix(v)), 'hex')`
`77`	`77`	`} else {`
`78`	`78`	`throw new Error(`
`79`		`- 'Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings.',`
	`79`	+ `Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings and this string was given: ${v}`,
`80`	`80`	`)`
`81`	`81`	`}`
`82`	`82`	`} else if (typeof v === 'number') {`