unit tests for csv parser

packages/server/src/utilities/csvParser.js

@@ -71,6 +71,7 @@ async function transform({ schema, path }) {
     return json
   } catch (err) {
     console.error(`Error transforming CSV to JSON for data import`, err)
+    throw err
   }
 }
 

packages/server/src/utilities/tests/__snapshots__/csvParser.spec.js.snap

@@ -0,0 +1,21 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`CSV Parser transformation transforms a CSV file into JSON 1`] = `
+Array [
+  Object {
+    "Address": "5 Sesame Street",
+    "Age": 4324,
+    "Name": "Bert",
+  },
+  Object {
+    "Address": "1 World Trade Center",
+    "Age": 34,
+    "Name": "Ernie",
+  },
+  Object {
+    "Address": "44 Second Avenue",
+    "Age": 23423,
+    "Name": "Big Bird",
+  },
+]
+`;

packages/server/src/utilities/tests/csvParser.spec.js

@@ -0,0 +1,108 @@
+const csvParser = require("../csvParser");
+
+const CSV_PATH = __dirname + "/test.csv";
+
+const SCHEMAS = {
+  VALID: {
+    Age: {
+      type: "number",
+    },
+  },
+  INVALID: {
+    Address: {
+      type: "number",
+    },
+    Age: {
+      type: "number",
+    },
+  },
+  IGNORE: {
+    Address: {
+      type: "omit",
+    },
+    Age: {
+      type: "omit",
+    },
+  },
+  BROKEN: {
+    Address: {
+      type: "datetime",
+    }
+  },
+};
+
+describe("CSV Parser", () => {
+  describe("parsing", () => {
+    it("returns status and types for a valid CSV transformation", async () => {
+      expect(
+        await csvParser.parse(CSV_PATH, SCHEMAS.VALID)
+      ).toEqual({
+        Address: {
+          success: true,
+          type: "string",
+        },
+        Age: {
+          success: true,
+          type: "number",
+        },
+        Name: {
+          success: true,
+          type: "string",
+        },
+      });
+    });
+
+    it("returns status and types for an invalid CSV transformation", async () => {
+      expect(
+        await csvParser.parse(CSV_PATH, SCHEMAS.INVALID)
+      ).toEqual({
+        Address: {
+          success: false,
+          type: "number",
+        },
+        Age: {
+          success: true,
+          type: "number",
+        },
+        Name: {
+          success: true,
+          type: "string",
+        },
+      });
+    });
+  });
+
+  describe("transformation", () => {
+    it("transforms a CSV file into JSON", async () => {
+      expect(
+        await csvParser.transform({
+          schema: SCHEMAS.VALID,
+          path: CSV_PATH,
+        })
+      ).toMatchSnapshot();
+    });
+
+    it("transforms a CSV file into JSON ignoring certain fields", async () => {
+      expect(
+        await csvParser.transform({
+          schema: SCHEMAS.IGNORE,
+          path: CSV_PATH,
+        })
+      ).toEqual([
+        {
+          Name: "Bert"
+        },
+        {
+          Name: "Ernie"
+        },
+        {
+          Name: "Big Bird"
+        }
+      ]);
+    });
+
+    it("throws an error on invalid schema", async () => {
+      await expect(csvParser.transform({ schema: SCHEMAS.BROKEN, path: CSV_PATH })).rejects.toThrow()
+    });
+  });
+});

packages/server/src/utilities/tests/test.csv

@@ -0,0 +1,4 @@
+"Name","Age","Address"
+"Bert","4324","5 Sesame Street"
+"Ernie","34","1 World Trade Center"
+"Big Bird","23423","44 Second Avenue"