Command tests (#922)

* WIP command tests

* Finish marking todo tests

* update

* update

* Windows cd test ignoring

crates/nu-command/tests/commands/get.rs

@@ -0,0 +1,229 @@
+use nu_test_support::fs::Stub::FileWithContent;
+use nu_test_support::playground::Playground;
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn fetches_a_row() {
+    Playground::setup("get_test_1", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContent(
+            "sample.toml",
+            r#"
+                nu_party_venue = "zion"
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open sample.toml
+                | get nu_party_venue
+            "#
+        ));
+
+        assert_eq!(actual.out, "zion");
+    })
+}
+
+#[test]
+fn fetches_by_index() {
+    Playground::setup("get_test_2", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContent(
+            "sample.toml",
+            r#"
+                [package]
+                name = "nu"
+                version = "0.4.1"
+                authors = ["Yehuda Katz <wycats@gmail.com>", "Jonathan Turner <jonathan.d.turner@gmail.com>", "Andrés N. Robalino <andres@androbtech.com>"]
+                description = "When arepas shells are tasty and fun."
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open sample.toml
+                | get package.authors.2
+            "#
+        ));
+
+        assert_eq!(actual.out, "Andrés N. Robalino <andres@androbtech.com>");
+    })
+}
+#[test]
+fn fetches_by_column_path() {
+    Playground::setup("get_test_3", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContent(
+            "sample.toml",
+            r#"
+                [package]
+                name = "nu"
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open sample.toml
+                | get package.name
+            "#
+        ));
+
+        assert_eq!(actual.out, "nu");
+    })
+}
+
+#[test]
+fn column_paths_are_either_double_quoted_or_regular_unquoted_words_separated_by_dot() {
+    Playground::setup("get_test_4", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContent(
+            "sample.toml",
+            r#"
+                [package]
+                9999 = ["Yehuda Katz <wycats@gmail.com>", "Jonathan Turner <jonathan.d.turner@gmail.com>", "Andrés N. Robalino <andres@androbtech.com>"]
+                description = "When arepas shells are tasty and fun."
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open sample.toml
+                | get package."9999"
+                | length
+            "#
+        ));
+
+        assert_eq!(actual.out, "3");
+    })
+}
+
+#[test]
+fn fetches_more_than_one_column_path() {
+    Playground::setup("get_test_5", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContent(
+            "sample.toml",
+            r#"
+                [[fortune_tellers]]
+                name = "Andrés N. Robalino"
+                arepas = 1
+
+                [[fortune_tellers]]
+                name = "Jonathan Turner"
+                arepas = 1
+
+                [[fortune_tellers]]
+                name = "Yehuda Katz"
+                arepas = 1
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open sample.toml
+                | get fortune_tellers.2.name fortune_tellers.0.name fortune_tellers.1.name
+                | nth 2
+            "#
+        ));
+
+        assert_eq!(actual.out, "Jonathan Turner");
+    })
+}
+
+// FIXME: jt: needs more work
+#[ignore]
+#[test]
+fn errors_fetching_by_column_not_present() {
+    Playground::setup("get_test_6", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContent(
+            "sample.toml",
+            r#"
+                [taconushell]
+                sentence_words = ["Yo", "quiero", "taconushell"]
+                [pizzanushell]
+                sentence-words = ["I", "want", "pizza"]
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open sample.toml
+                | get taco
+            "#
+        ));
+
+        assert!(actual.err.contains("Unknown column"),);
+        assert!(actual.err.contains("There isn't a column named 'taco'"),);
+        assert!(actual.err.contains("Perhaps you meant 'taconushell'?"),);
+        assert!(actual
+            .err
+            .contains("Columns available: pizzanushell, taconushell"),);
+    })
+}
+
+// FIXME: jt: needs more work
+#[ignore]
+#[test]
+fn errors_fetching_by_column_using_a_number() {
+    Playground::setup("get_test_7", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContent(
+            "sample.toml",
+            r#"
+                [spanish_lesson]
+                0 = "can only be fetched with 0 double quoted."
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open sample.toml
+                | get spanish_lesson.0
+            "#
+        ));
+
+        assert!(actual.err.contains("No rows available"),);
+        assert!(actual.err.contains("A row at '0' can't be indexed."),);
+        assert!(actual
+            .err
+            .contains("Appears to contain columns. Columns available: 0"),)
+    })
+}
+
+// FIXME: jt: needs more work
+#[ignore]
+#[test]
+fn errors_fetching_by_index_out_of_bounds() {
+    Playground::setup("get_test_8", |dirs, sandbox| {
+        sandbox.with_files(vec![FileWithContent(
+            "sample.toml",
+            r#"
+                [spanish_lesson]
+                sentence_words = ["Yo", "quiero", "taconushell"]
+            "#,
+        )]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            r#"
+                open sample.toml
+                | get spanish_lesson.sentence_words.3
+            "#
+        ));
+
+        assert!(actual.err.contains("Row not found"),);
+        assert!(actual.err.contains("There isn't a row indexed at 3"),);
+        assert!(actual.err.contains("The table only has 3 rows (0 to 2)"),)
+    })
+}
+
+#[test]
+fn quoted_column_access() {
+    let actual = nu!(
+        cwd: "tests/fixtures/formats",
+        r#"echo '[{"foo bar": {"baz": 4}}]' | from json | get "foo bar".baz "#
+    );
+
+    assert_eq!(actual.out, "4");
+}