feat: Add bucket schema management commands (#52)

* feat: update generated client to include schema-management APIs
* feat: implement interfaces to decode flags and CSV
* feat: implement decoders for different measurement schema column formats
* feat: extend bucket CLI commands to support schema type property
* feat: add CLI commands to manage measurement schema
* test: add unit tests for bucket schema create, update and list commands

internal/cmd/bucket_schema/csv_test.go

@@ -0,0 +1,85 @@
+package bucket_schema
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/MakeNowJust/heredoc/v2"
+	"github.com/influxdata/influx-cli/v2/internal/api"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDecodeCSV(t *testing.T) {
+	tests := []struct {
+		name   string
+		data   string
+		exp    []api.MeasurementSchemaColumn
+		expErr string
+	}{
+		{
+			name: "valid",
+			data: heredoc.Doc(`
+				name,type,data_type
+				time,timestamp,
+				host,tag,
+				usage_user,field,float
+			`),
+			exp: cols(colTs(), colT("host"), colFF("usage_user")),
+		},
+		{
+			name: "valid with alternate order",
+			data: heredoc.Doc(`
+				type,data_type,name
+				timestamp,,time
+				tag,,host
+				field,float,usage_user
+			`),
+			exp: cols(colTs(), colT("host"), colFF("usage_user")),
+		},
+		{
+			name: "invalid column type",
+			data: heredoc.Doc(`
+				name,type,data_type
+				time,foo,
+			`),
+			expErr: `failed to decode CSV: record on line 0; parse error on line 2, column 2: "foo" is not a valid column type. Valid values are [timestamp, tag, field]`,
+		},
+		{
+			name: "invalid column data type",
+			data: heredoc.Doc(`
+				name,type,data_type
+				time,field,floaty
+			`),
+			expErr: `failed to decode CSV: record on line 0; parse error on line 2, column 3: "floaty" is not a valid column data type. Valid values are [integer, float, boolean, string, unsigned]`,
+		},
+		{
+			name: "invalid headers",
+			data: heredoc.Doc(`
+				name,foo
+				time,field
+			`),
+			expErr: `failed to decode CSV: found unmatched struct field with tags [type data_type]`,
+		},
+		{
+			name: "invalid CSV",
+			data: heredoc.Doc(`
+				type,type,data_type
+				time,timestamp
+			`),
+			expErr: `failed to decode CSV: record on line 2: wrong number of fields`,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			r := strings.NewReader(tt.data)
+			got, err := decodeCSV(r)
+			if tt.expErr != "" {
+				assert.EqualError(t, err, tt.expErr)
+			} else {
+				require.NoError(t, err)
+				assert.Equal(t, tt.exp, got)
+			}
+		})
+	}
+}