# vim: set filetype=expect:
#
# This is a very fragile test. Sorry about that. But interactively entering
# commands and verifying they are recorded correctly in the interactive
# history and that history can be manipulated is inherently difficult.
#
# This is meant to verify just a few of the most basic behaviors of the
# interactive history to hopefully keep regressions from happening. It is not
# meant to be a comprehensive test of the history subsystem. Those types of
# tests belong in the src/fish_tests.cpp module.
#

# The history function might pipe output through the user's pager. We don't
# want something like `less` to complicate matters so force the use of `cat`.
set ::env(PAGER) cat
spawn $fish
expect_prompt

# ==========
# Start by ensuring we're not affected by earlier tests. Clear the history.
send "builtin history --clear\r"
expect_prompt

# ==========
# The following tests verify the behavior of the history builtin.
# ==========

# ==========
# List our history which should be empty after just clearing it.
send "echo start1; builtin history; echo end1\r"
expect_prompt -re {start1\r\nend1\r\n} {
    puts "empty history detected as expected"
} unmatched {
    puts stderr "empty history not detected as expected"
}

# ==========
# Our history should now contain the previous command and nothing else.
send "echo start2; builtin history; echo end2\r"
expect_prompt -re {start2\r\necho start1; builtin history; echo end1\r\nend2\r\n} {
    puts "first history command detected as expected"
} unmatched {
    puts stderr "first history command not detected as expected"
}

# ==========
# Verify asking for two different actions produces an error.
send "builtin history --search --merge\r"
expect_prompt -re {\r\nYou cannot do both 'search' and 'merge' in the same 'history' invocation\r\n} {
    puts "invalid attempt at multiple history commands detected"
} unmatched {
    puts stderr "invalid attempt at multiple history commands not detected"
}

# ==========
# The following tests verify the behavior of the history function.
# ==========

# ==========
# Verify explicit searching for the first two commands in the previous tests
# returns the expected results.
send "history --search echo start\r"
expect_prompt -re {\r\necho start1.*\r\necho start2} {
    puts "history function explicit search succeeded"
} unmatched {
    puts stderr "history function explicit search failed"
}

# ==========
# Verify searching is the implicit action.
send "history echo start\r"
expect_prompt -re {\r\necho start1.*\r\necho start2} {
    puts "history function implicit search succeeded"
} unmatched {
    puts stderr "history function implicit search failed"
}

# ==========
# Verify implicit searching with a request for timestamps includes the timestamps.
send "history -t echo start\r"
expect_prompt -re {\r\n# \d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\r\necho start1; builtin history;.*\r\n# \d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\r\necho start2; builtin history} {
    puts "history function implicit search with timestamps succeeded"
} unmatched {
    puts stderr "history function implicit search with timestamps failed"
}

# ==========
# Verify explicit searching for an exact command returns just that command.
# returns the expected results.
send "echo hello\r"
expect_prompt
send "echo goodbye\r"
expect_prompt
send "echo hello again\r"
expect_prompt
send "echo hello AGAIN\r"
expect_prompt

send "history --search --exact 'echo goodbye'\r"
expect_prompt -re {\r\necho goodbye\r\n} {
    puts "history function explicit exact search 'echo goodbye' succeeded"
} unmatched {
    puts stderr "history function explicit exact search 'echo goodbye' failed"
}

send "history --search --exact 'echo hello'\r"
expect_prompt -re {\r\necho hello\r\n} {
    puts "history function explicit exact search 'echo hello' succeeded"
} unmatched {
    puts stderr "history function explicit exact search 'echo hello' failed"
}

# This is slightly subtle in that it shouldn't actually match anything between
# the command we sent and the next prompt.
send "history --search --exact 'echo hell'\r"
expect_prompt -re {history --search --exact 'echo hell'\r\n} {
    puts "history function explicit exact search 'echo hell' succeeded"
} unmatched {
    puts stderr "history function explicit exact search 'echo hell' failed"
}

# ==========
# Delete a single command we recently ran.
send "history --delete 'echo hello'\r"
expect_prompt -re {history --delete 'echo hello'\r\n} {
    puts "history function explicit exact delete 'echo hello' succeeded"
} unmatched {
    puts stderr "history function explicit exact delete 'echo hello' failed"
}

# ==========
# Interactively delete one of multiple matched commands. This verifies that we
# delete the first entry matched by the prefix search (the most recent command
# sent above that matches).
send "history --delete -p 'echo hello'\r"
expect -re {history --delete -p 'echo hello'\r\n}
expect -re {\[1\] echo hello AGAIN\r\n}
expect -re {\[2\] echo hello again\r\n\r\n}
expect -re {Enter nothing to cancel.*\r\nEnter "all" to delete all the matching entries\.\r\n}
expect -re {Delete which entries\? >}
send "1\r"
expect_prompt -re {Deleting history entry 1: "echo hello AGAIN"\r\n} {
    puts "history function explicit prefix delete 'echo hello' succeeded"
} unmatched {
    puts stderr "history function explicit prefix delete 'echo hello' failed"
}

# Verify that the deleted history entry is gone and the other one that matched
# the prefix search above is still there.
send "history --search --exact 'echo hello again'\r"
expect_prompt -re {\r\necho hello again\r\n} {
    puts "history function explicit exact search 'echo hello again' succeeded"
} unmatched {
    puts stderr "history function explicit exact search 'echo hello again' failed"
}

send "history --search --exact 'echo hello AGAIN'\r"
expect_prompt -re {\r\necho hello AGAIN\r\n} {
    puts stderr "history function explicit exact search 'echo hello AGAIN' found the entry"
} unmatched {
    puts "history function explicit exact search 'echo hello AGAIN' failed to find the entry"
}