Add populate exchange

src/__snapshots__/populate.test.ts.snap

@@ -0,0 +1,114 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`on (query w/ fragment) -> mutation mutation query matches snapshot 1`] = `
+"mutation MyMutation {
+  addTodo {
+    ...Todo_PopulateFragment_0
+  }
+}
+
+fragment Todo_PopulateFragment_0 on Todo {
+  ...TodoFragment
+}
+
+fragment TodoFragment on Todo {
+  id
+  text
+}
+"
+`;
+
+exports[`on (query w/ unused fragment) -> mutation mutation query matches snapshot 1`] = `
+"mutation MyMutation {
+  addTodo {
+    ...Todo_PopulateFragment_0
+  }
+}
+
+fragment Todo_PopulateFragment_0 on Todo {
+  id
+  text
+}
+"
+`;
+
+exports[`on mutation mutation query matches snapshot 1`] = `
+"mutation MyMutation {
+  addTodo {
+    __typename
+  }
+}
+"
+`;
+
+exports[`on query -> (mutation w/ interface return type) mutation query matches snapshot 1`] = `
+"mutation MyMutation {
+  removeTodo {
+    ...Todo_PopulateFragment_0
+    ...User_PopulateFragment_0
+  }
+}
+
+fragment Todo_PopulateFragment_0 on Todo {
+  id
+  name
+}
+
+fragment User_PopulateFragment_0 on User {
+  id
+  text
+}
+"
+`;
+
+exports[`on query -> (mutation w/ union return type) mutation query matches snapshot 1`] = `
+"mutation MyMutation {
+  updateTodo {
+    ...User_PopulateFragment_0
+    ...Todo_PopulateFragment_0
+  }
+}
+
+fragment User_PopulateFragment_0 on User {
+  id
+  text
+}
+
+fragment Todo_PopulateFragment_0 on Todo {
+  id
+  name
+}
+"
+`;
+
+exports[`on query -> mutation mutation query matches snapshot 1`] = `
+"mutation MyMutation {
+  addTodo {
+    ...Todo_PopulateFragment_0
+    ...Todo_PopulateFragment_1
+  }
+}
+
+fragment Todo_PopulateFragment_0 on Todo {
+  id
+  text
+  creator {
+    id
+    name
+  }
+}
+
+fragment Todo_PopulateFragment_1 on Todo {
+  text
+}
+"
+`;
+
+exports[`on query -> teardown -> mutation mutation query matches snapshot 1`] = `
+"mutation MyMutation {
+  addTodo {
+    __typename
+  }
+}
+"
+`;