fix: handle missing leading slash in path

Author: vwong

src/__tests__/fixtures/request-parameters-path/baseline.json

@@ -5,7 +5,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path does not match integer spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[3].request.path",
+      "location": "[root].interactions[4].request.path",
       "value": "/integer/abc"
     },
     "specDetails": {
@@ -90,7 +90,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path does not match boolean spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[4].request.path",
+      "location": "[root].interactions[5].request.path",
       "value": "/boolean/abc"
     },
     "specDetails": {
@@ -175,7 +175,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path and method does not exist in spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[7].request.path",
+      "location": "[root].interactions[8].request.path",
       "value": "/does-not-exist"
     },
     "specDetails": {
@@ -260,7 +260,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path does not exist in spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[8].request.path",
+      "location": "[root].interactions[9].request.path",
       "value": "/integer/1"
     },
     "specDetails": {

src/__tests__/fixtures/request-parameters-path/pact.json

@@ -32,6 +32,16 @@
         "status": 200
       }
     },
+    {
+      "description": "should pass when path does not start with /",
+      "request": {
+        "method": "GET",
+        "path": "integer/1"
+      },
+      "response": {
+        "status": 200
+      }
+    },
     {
       "description": "should error when path does not match integer spec",
       "request": {

src/__tests__/fixtures/request-parameters-path/results.json

@@ -5,7 +5,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path does not match integer spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[3].request.path",
+      "location": "[root].interactions[4].request.path",
       "value": "/integer/abc"
     },
     "specDetails": {
@@ -38,7 +38,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path does not match boolean spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[4].request.path",
+      "location": "[root].interactions[5].request.path",
       "value": "/boolean/abc"
     },
     "specDetails": {
@@ -71,7 +71,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path does not match object spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[5].request.path",
+      "location": "[root].interactions[6].request.path",
       "value": "/exploded-object/string=abc,number=abc"
     },
     "specDetails": {
@@ -114,7 +114,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path does not match object spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[6].request.path",
+      "location": "[root].interactions[7].request.path",
       "value": "/exploded-object/string=abc,number=abc"
     },
     "specDetails": {
@@ -157,7 +157,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path and method does not exist in spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[7].request.path",
+      "location": "[root].interactions[8].request.path",
       "value": "/does-not-exist"
     },
     "specDetails": {
@@ -173,7 +173,7 @@
     "mockDetails": {
       "interactionDescription": "should error when path does not exist in spec",
       "interactionState": "[none]",
-      "location": "[root].interactions[8].request.path",
+      "location": "[root].interactions[9].request.path",
       "value": "/integer/1"
     },
     "specDetails": {

src/compare/index.ts

@@ -60,6 +60,7 @@ export class Comparator {
 
     for (const [index, interaction] of parsedPact.interactions.entries()) {
       const { method, path, query } = interaction.request;
+      const pathWithLeadingSlash = path.startsWith("/") ? path : `/${path}`;
       // in pact, query is either a string or an object of only one level deep
       const stringQuery =
         typeof query === "string"
@@ -75,7 +76,7 @@ export class Comparator {
               .substring(1);
       const route = this.#router.find(
         method.toUpperCase() as HTTPMethod,
-        [path, stringQuery].filter(Boolean).join("?"),
+        [pathWithLeadingSlash, stringQuery].filter(Boolean).join("?"),
       );
 
       if (!route) {