name:   level_1
label:  a basic level-1 heading
input:  "= Heading ="
output: [HeadingStart(level=1), Text(text=" Heading "), HeadingEnd()]

---

name:   level_2
label:  a basic level-2 heading
input:  "== Heading =="
output: [HeadingStart(level=2), Text(text=" Heading "), HeadingEnd()]

---

name:   level_3
label:  a basic level-3 heading
input:  "=== Heading ==="
output: [HeadingStart(level=3), Text(text=" Heading "), HeadingEnd()]

---

name:   level_4
label:  a basic level-4 heading
input:  "==== Heading ===="
output: [HeadingStart(level=4), Text(text=" Heading "), HeadingEnd()]

---

name:   level_5
label:  a basic level-5 heading
input:  "===== Heading ====="
output: [HeadingStart(level=5), Text(text=" Heading "), HeadingEnd()]

---

name:   level_6
label:  a basic level-6 heading
input:  "====== Heading ======"
output: [HeadingStart(level=6), Text(text=" Heading "), HeadingEnd()]

---

name:   level_7
label:  a level-6 heading that pretends to be a level-7 heading
input:  "======= Heading ======="
output: [HeadingStart(level=6), Text(text="= Heading ="), HeadingEnd()]

---

name:   level_3_2
label:  a level-2 heading that pretends to be a level-3 heading
input:  "=== Heading =="
output: [HeadingStart(level=2), Text(text="= Heading "), HeadingEnd()]

---

name:   level_4_6
label:  a level-4 heading that pretends to be a level-6 heading
input:  "==== Heading ======"
output: [HeadingStart(level=4), Text(text=" Heading =="), HeadingEnd()]

---

name:   newline_before
label:  a heading that starts after a newline
input:  "This is some text.\n== Foobar ==\nbaz"
output: [Text(text="This is some text.\n"), HeadingStart(level=2), Text(text=" Foobar "), HeadingEnd(), Text(text="\nbaz")]

---

name:   text_after
label:  text on the same line after
input:  "This is some text.\n== Foobar == baz"
output: [Text(text="This is some text.\n"), HeadingStart(level=2), Text(text=" Foobar "), HeadingEnd(), Text(text=" baz")]

---

name:   invalid_text_before
label:  invalid headings: text on the same line before
input:  "This is some text. == Foobar ==\nbaz"
output: [Text(text="This is some text. == Foobar ==\nbaz")]

---

name:   invalid_newline_middle
label:  invalid headings: newline in the middle
input:  "This is some text.\n== Foo\nbar =="
output: [Text(text="This is some text.\n== Foo\nbar ==")]

---

name:   invalid_newline_end
label:  invalid headings: newline in the middle
input:  "This is some text.\n=== Foo\n==="
output: [Text(text="This is some text.\n=== Foo\n===")]

---

name:   invalid_nesting
label:  invalid headings: attempts at nesting
input:  "== Foo === Bar === Baz =="
output: [HeadingStart(level=2), Text(text=" Foo === Bar === Baz "), HeadingEnd()]

---

name:   incomplete
label:  a heading that starts but doesn't finish
input:  "Foobar. \n== Heading "
output: [Text(text="Foobar. \n== Heading ")]