feat(100DaysOfCode): day 54 and 55

content/posts/2021/2021-07-18-go-R1-day-54.md

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+---
+date: 2021-07-18T16:07:39-05:00
+title: Go R1 Day 54
+slug: go-r1-day-54
+area: go
+round: 1
+day_counter: 54
+tags:
+- tech
+- development
+- 100DaysOfCode
+- golang
+- microblog
+typora-root-url: ../../../static
+typora-copy-images-to:  ../../../static/images
+
+# images: [/images/r1-d54-IMAGE.png]
+
+---
+
+## progress
+
+- worked with tests and Goland.
+- Modified table driven tests to remove hard coded test case inputs.

content/posts/2021/2021-07-19-go-R1-day-55.md

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+---
+date: 2021-07-19T16:07:41-05:00
+title: Go R1 Day 55
+slug: go-r1-day-55
+area: go
+round: 1
+day_counter: 55
+tags:
+- tech
+- development
+- 100DaysOfCode
+- golang
+- microblog
+typora-root-url: ../../../static
+typora-copy-images-to:  ../../../static/images
+images: [/images/go-r1-d55-goland-test-summary.png]
+
+---
+
+## progress
+
+> In Go, when you call a function or a method the arguments are copied. [^pointers]
+
+- Built some test cases for working with pointers and test methods.
+- Did this in Goland to become more familar with it and figured out how to use the nice tests explorer with a floating window to auto-test.
+- Built a filewatcher configuration watcher as alternative to tests panel, allowing automated run in terminal or output panel of `go test ./...`.
+- Couldn't figure out how to run every test in project, as it's a multi-module repo (for tutorials).
+VSCode works fine with this with the multi-module support.
+
+> These pointers to structs even have their own name: struct pointers and they are automatically dereferenced.  [^pointers]
+
+This explains something that felt a little confusing as a new Gopher.
+Now I know why returning a value back as an int didn't require explicit dereferencing. [^dereferencing]
+
+```go
+func (w *Wallet) Balance() int {
+  return w.balance // <---- automatically deferenced
+}
+```
+
+Not clear yet on if I need to set the `is := New(t)` in the context of each `t.Run()` or not.
+
+```go
+t.Run("withdraw 2 amounts", func(t *testing.T) {
+		wallet := pointers.Wallet{}
+		wallet.Deposit(pointers.Bitcoin(20))
+		err := wallet.Withdraw(pointers.Bitcoin(5))
+		is.NoErr(err) // Withdraw should have no errors
+		assertBalance(t, &wallet, pointers.Bitcoin(15))
+	})
+```
+
+## links
+
+- [feat: ✅ add pointer test progress · sheldonhull/learn-go-with-tests-applied@f89a206 · GitHub](https://github.com/sheldonhull/learn-go-with-tests-applied/commit/f89a2069def3c99c6a0199b64b826034e8b37edc)
+- [tests: 🧪 refactor tests for bitcoin wallet and run configurations · sheldonhull/learn-go-with-tests-applied@9f27fe0 · GitHub](https://github.com/sheldonhull/learn-go-with-tests-applied/commit/9f27fe07a8437de7182698c820733b4d57c1be28)
+- [tests: 🧪 refactor tests for bitcoin wallet and improve final test cov… · sheldonhull/learn-go-with-tests-applied@1f3db9f · GitHub](https://github.com/sheldonhull/learn-go-with-tests-applied/commit/1f3db9f57ee622f90f5de50c01073891c4457d92)
+
+[^pointers]: [Pointers](https://quii.gitbook.io/learn-go-with-tests/go-fundamentals/pointers-and-errors)
+[^dereferencing]: [Method Values](https://golang.org/ref/spec#Method_values)