Refactor the parser and add tests

1 files changed, 228 insertions, 0 deletions

diff --git a/mintages/parser_test.go b/mintages/parser_test.go
new file mode 100644
index 0000000..ee2b06e
--- /dev/null
+++ b/mintages/parser_test.go
@@ -0,0 +1,228 @@
+package mintages
+
+import (
+	"bytes"
+	"errors"
+	"testing"
+	"time"
+)
+
+func TestParserComplete(t *testing.T) {
+	data, err := parse(bytes.NewBuffer([]byte(`
+		BEGIN 2020
+		BEGIN CIRC
+		1.000 1001 1002 1003 1004 1005 1006 1007
+		 2000    ? 2002 2003 2004 2005 2006 2007
+		BEGIN BU
+		1.100 1101 1102 1103 1104 1105 1106 1107
+		 2100    ? 2102 2103 2104 2105 2106 2107
+		BEGIN PROOF
+		1.200 1201 1202 1203 1204 1205 1206 1207
+		 2200    ? 2202 2203 2204 2205 2206 2207
+	`)), "-")
+
+	if err != nil {
+		t.Fatalf(`Expected err=nil; got "%s"`, err)
+	}
+	if data.StartYear != 2020 {
+		t.Fatalf("Expected data.StartYear=2020; got %d",
+			data.StartYear)
+	}
+
+	/* The following 3 loops assert that we have correct mintages,
+	   including padding mintages.  After the loops we assert that the
+	   number of padding mintages is actually correct. */
+
+	for i, row := range data.Circ {
+		for j, col := range row {
+			var n int
+			switch {
+			case i == 1 && j == 1, i >= 2:
+				n = -1
+			default:
+				n = 1000*i + j + 1000
+			}
+			if col != n {
+				t.Fatalf("Expected data.Circ[i][j]=%d; got %d", n, col)
+			}
+		}
+	}
+
+	for i, row := range data.BU {
+		for j, col := range row {
+			var n int
+			switch {
+			case i == 1 && j == 1, i >= 2:
+				n = -1
+			default:
+				n = 1000*i + j + 1100
+			}
+			if col != n {
+				t.Fatalf("Expected data.BU[i][j]=%d; got %d", n, col)
+			}
+		}
+	}
+
+	for i, row := range data.Proof {
+		for j, col := range row {
+			var n int
+			switch {
+			case i == 1 && j == 1, i >= 2:
+				n = -1
+			default:
+				n = 1000*i + j + 1200
+			}
+			if col != n {
+				t.Fatalf("Expected data.Proof[i][j]=%d; got %d", n, col)
+			}
+		}
+	}
+
+	rowsWant := time.Now().Year() - data.StartYear + 1
+	if len(data.Circ) != rowsWant {
+		t.Fatalf("Expected len(data.Circ)=%d; got %d", rowsWant, len(data.Circ))
+	}
+	if len(data.BU) != rowsWant {
+		t.Fatalf("Expected len(data.BU)=%d; got %d", rowsWant, len(data.BU))
+	}
+	if len(data.Proof) != rowsWant {
+		t.Fatalf("Expected len(data.Proof)=%d; got %d", rowsWant, len(data.Proof))
+	}
+}
+
+func TestParserNoYear(t *testing.T) {
+	_, err := parse(bytes.NewBuffer([]byte(`
+		BEGIN CIRC
+		1.000 1001 1002 1003 1004 1005 1006 1007
+		 2000    ? 2002 2003 2004 2005 2006 2007
+		BEGIN BU
+		1.100 1101 1102 1103 1104 1105 1106 1107
+		 2100    ? 2102 2103 2104 2105 2106 2107
+		BEGIN PROOF
+		1.200 1201 1202 1203 1204 1205 1206 1207
+		 2200    ? 2202 2203 2204 2205 2206 2207
+	`)), "-")
+
+	var sErr SyntaxError
+	if !errors.As(err, &sErr) {
+		t.Fatalf("Expected err=SyntaxError; got %s", err)
+	}
+}
+
+func TestParserNoType(t *testing.T) {
+	_, err := parse(bytes.NewBuffer([]byte(`
+		BEGIN 2020
+		1.000 1001 1002 1003 1004 1005 1006 1007
+		 2000    ? 2002 2003 2004 2005 2006 2007
+		BEGIN BU
+		1.100 1101 1102 1103 1104 1105 1106 1107
+		 2100    ? 2102 2103 2104 2105 2106 2107
+		BEGIN PROOF
+		1.200 1201 1202 1203 1204 1205 1206 1207
+		 2200    ? 2202 2203 2204 2205 2206 2207
+	`)), "-")
+
+	var sErr SyntaxError
+	if !errors.As(err, &sErr) {
+		t.Fatalf("Expected err=SyntaxError; got %s", err)
+	}
+}
+
+func TestParserNoYearOrType(t *testing.T) {
+	_, err := parse(bytes.NewBuffer([]byte(`
+		1.000 1001 1002 1003 1004 1005 1006 1007
+		 2000    ? 2002 2003 2004 2005 2006 2007
+		BEGIN BU
+		1.100 1101 1102 1103 1104 1105 1106 1107
+		 2100    ? 2102 2103 2104 2105 2106 2107
+		BEGIN PROOF
+		1.200 1201 1202 1203 1204 1205 1206 1207
+		 2200    ? 2202 2203 2204 2205 2206 2207
+	`)), "-")
+
+	var sErr SyntaxError
+	if !errors.As(err, &sErr) {
+		t.Fatalf("Expected err=SyntaxError; got %s", err)
+	}
+}
+
+func TestParserBadToken(t *testing.T) {
+	_, err := parse(bytes.NewBuffer([]byte(`
+		BEGIN 2020
+		BEGIN CIRC
+		1.000 1001 1002 1003 1004 1005 1006 1007
+		I’m bad
+		 2000    ? 2002 2003 2004 2005 2006 2007
+		BEGIN BU
+		1.100 1101 1102 1103 1104 1105 1106 1107
+		 2100    ? 2102 2103 2104 2105 2106 2107
+		BEGIN PROOF
+		1.200 1201 1202 1203 1204 1205 1206 1207
+		 2200    ? 2202 2203 2204 2205 2206 2207
+	`)), "-")
+
+	var sErr SyntaxError
+	if !errors.As(err, &sErr) {
+		t.Fatalf("Expected err=SyntaxError; got %s", err)
+	}
+}
+
+func TestParserShortRow(t *testing.T) {
+	_, err := parse(bytes.NewBuffer([]byte(`
+		BEGIN 2020
+		BEGIN CIRC
+		1.000 1001 1002 1003 1004 1005 1006 1007
+		 2000    ? 2002 2003 2004 2005 2006 2007
+		BEGIN BU
+		1.100 1101 1102 1103 1104 1105 1106 1107
+		 2100    ? 2102 2103 2104 2105 2106
+		BEGIN PROOF
+		1.200 1201 1202 1203 1204 1205 1206 1207
+		 2200    ? 2202 2203 2204 2205 2206 2207
+	`)), "-")
+
+	var sErr SyntaxError
+	if !errors.As(err, &sErr) {
+		t.Fatalf("Expected err=SyntaxError; got %s", err)
+	}
+}
+
+func TestParserLongRow(t *testing.T) {
+	_, err := parse(bytes.NewBuffer([]byte(`
+		BEGIN 2020
+		BEGIN CIRC
+		1.000 1001 1002 1003 1004 1005 1006 1007
+		 2000    ? 2002 2003 2004 2005 2006 2007
+		BEGIN BU
+		1.100 1101 1102 1103 1104 1105 1106 1107
+		 2100    ? 2102 2103 2104 2105 2106 2107 2108
+		BEGIN PROOF
+		1.200 1201 1202 1203 1204 1205 1206 1207
+		 2200    ? 2202 2203 2204 2205 2206 2207
+	`)), "-")
+
+	var sErr SyntaxError
+	if !errors.As(err, &sErr) {
+		t.Fatalf("Expected err=SyntaxError; got %s", err)
+	}
+}
+
+func TestParserBadCoinType(t *testing.T) {
+	_, err := parse(bytes.NewBuffer([]byte(`
+		BEGIN 2020
+		BEGIN CIRCULATED
+		1.000 1001 1002 1003 1004 1005 1006 1007
+		 2000    ? 2002 2003 2004 2005 2006 2007
+		BEGIN BU
+		1.100 1101 1102 1103 1104 1105 1106 1107
+		 2100    ? 2102 2103 2104 2105 2106 2107 2108
+		BEGIN PROOF
+		1.200 1201 1202 1203 1204 1205 1206 1207
+		 2200    ? 2202 2203 2204 2205 2206 2207
+	`)), "-")
+
+	var sErr SyntaxError
+	if !errors.As(err, &sErr) {
+		t.Fatalf("Expected err=SyntaxError; got %s", err)
+	}
+}